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How much of an alloy that is 10 percent copper should be mixed with an alloy that is 80 percent copper in order to get an alloy that is 30 percent copper?
Let me reduce that to an equation for you: 10x + 80(1-x) = 30; solve for x.
What percent of 76 is 57?
is/of=%/100...it is a proportion problem. 57/76=%/100----->57/76=x/100 76x=5700 Then divide by 76 on both sides of the = sign. your answer should come out to: 75%
What is the equation on how to figuar out 25 percent of 100?
100 divided by 100/25. JHC! I think you should go back over the meaning of "per cent"
In what proportion should 95 percent percent alcohol be mised with 30 percent percent alcohol to make 70 percent percent?
x = volume of 95% y = volume of 30% so (x+y) is volume of 70% 0.95 x + 0.30 y = 0.70(x+y) 0.95 x + 0.30 y = 0.70x + 0.70y 0.25x = 0.40y x/y = 0.40/0.25 = 8/5 for every 8 volumes of 95% mix in 5 volumes of 30%the volumes can be ml, liters, cups, pints etc.
How do you find a percent of a number if you know another percent?
To find out the percent of a number if you know another percent you do. . . the method of Cross-Mutltiplying and Dividing, for example let's say I got 23/25 on a math test and I want to know my percentage so X/100, your equation should look something like 23/25 = x/100. now that you got your equation let's do the math. Do 23 x 100 (23 multiplied by 100) then you get an answer of 2300. You would then divide 2300 by 25 and get your answer of 92%. That's basically why this method is called cross multiplying and dividing.
What is Is over of equals percent over 100 called?
It is called the percent proportion. It is set up as a proportion and can answer any questions dealing with finding the percent of a number, or the number for the percent. For example: What is 16% of 35? You are looking for "is." The percent is given to you and the "of" is given to you. You should set up the proportion like this: is = % of 100 x = 16 35 100 Cross multiply. You now have: 100x = 560 You have to get x by itself, so you divide both sides by 100. 100x = 560 100 100 x= 5.6
How do you find 15 percent of 15?
The best way is to create a proportion. x out of 15 is equal to 15 out of 100. Do 100 divided by 15 which is about 6.67. Then do 15/6.67. You should get x=2.25. Then do 2.25/15 to check you're work and you should get 15 percent.
Why 40 percent percent percent of the people should take electronics?
There is no reason why 6.4% (which is what 40%%% is) should take electronics. It is a lot more than is currently the case so many of them would probably not be much good at the subject. Furthermore, few economies would be able to support that proportion of people who have taken electronics.
How much of an alloy that is 10 percent copper should be mixed with an alloy that is 80 percent copper in order to get an alloy that is 30 percent copper?
Let me reduce that to an equation for you: 10x + 80(1-x) = 30; solve for x.
What is the proportion of bed concrete in foundation?
The proportion of the bed mortar should be 4:1 for the sand : cement.
How do you find the answer to 50 percent of 70?
To find 50 percent of 70, you can multiply 70 by 0.50 (which represents 50 percent as a decimal) or divide 70 by 2 (since 50 percent is half of 100 percent). Both methods will give you the same result, which is 35.
What is 32 percent of 250?
to do this problem, you would have to make a proportion. Knowing the phrase "is over of equals percent over 100"is helpful. On the left, you should place a X over 250. on the right should be a 32 over 100. then cross multiply to get 100x=8000. then all you have to do is divide to get 80. so the correct answer is 80.
What percent of 76 is 57?
is/of=%/100...it is a proportion problem. 57/76=%/100----->57/76=x/100 76x=5700 Then divide by 76 on both sides of the = sign. your answer should come out to: 75%
What is the equation on how to figuar out 25 percent of 100?
100 divided by 100/25. JHC! I think you should go back over the meaning of "per cent"
65 is what percent of 26?
First I would set up a proportion.. 65 over 100 = x over 26. Then cross multiply to get 1690=100x .. Then divide both sides by 100 and you should get 16.9 ..
What is the mix design proportion for M15?
How should I know ;P
How is a scientist wants to display the proportion of 250 geese that were male compared to the proportion that were female and what type of visual should the scientist use?
a circle graph
