For most percentage problems it is best to use a ratio.
Amount Percent
Total = 100
In this case your amount is 50 and percent is 25, you don't know the total
50 25
t = 100 Cross Multiply
50(100) = t(25) Solve for t
5000
25 = t
t = 200
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5o% of what number is 25
25 percent of 400 = 50 percent of 200
To determine the percentage between two numbers, you divide one number by the other and multiple by 100 percent. For instance, to determine what percentage 25 is of 50, 25 is divided by 50 giving a result of .5 and then multiplied by 100 percent giving a final result of 50 percent.
25 is what percent of 50= 25 / 50= 0.5Converting decimal to a percentage:0.5 * 100 = 50%
Find the difference between the first number and the second number and divide by the first number then change to a percent. 50-40=10 10/40=.25 or 25 percent increase. Don't forget to divide by the beginning amount because 50 to 40 is different.