1 times 100 equals 100
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2/8 = 25% The easiest way I've found to do percents is cross multiplying: 2/8 = x/100 So to solve for x, multiply 2 times 100 (equals 200) and divide by 8 (equals 25). So 25/100 equals 25%. Works for anything... Another example: what is the percentage of 53 out of 976? 53/976 = x/100 So 53 times 100 (equals 5300) and divide 5300 by 976 (equals 5.43) or 5.43%.
99+9/9
There is no way to know unless you had an equation that gives the relationship between x and y. For example, if y=2x, then when x equals 99 or x equals 100, then the value of y has a difference of 2.
The following is based on the correct order of operations. If the way you phrased the question is not what you actually meant, please go back and edit the question and I'll be happy to answer the new version. (40/x)(100)(.25)+(60/x)(100)(.75)=50 (1,000/x)+(4,500/x)=50 5,500/x=50 50x=5,500 x=110
Look at it this way: If p = 1, then 7p = 7. What plus 7 equals -3? Adding 7 to -10 would equal -3, so all we have to figure out is what times 5 would equal -10. 5 times -2 would equal -10 so q equals -2.