For example, if 25 out of 50 students in a classroom are male, . The value of the ratio is therefore 0.5, and multiplying this by 100 yields:. P is the percentage, V 1 is the first value that the percentage will modify, and V 2 is the result of the percentage operating on V 1. The calculator provided automatically converts the input.. The percent sign is: % 1 percent (1%) = 1 part per 100 = 1/100 = 0.01 (a portion less than a whole). 25 percent off sale ; sales tax is typically a percentage of purchase price: 8% sales tax ; interest rates for savings accounts are typically shown as an annual percentage rate (apr): 1.5% apr.
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Change the percentage figure into a decimal by dividing the figure by 100. So, 10% becomes 10/100 = 0.1. Multiply the decimal figure by the full amount. So, 0.1 x 200 = 20. This gives you your answer. 10% of 200 is 20. The formula for this calculation looks like this: Part = (X / 100) × Y.. Examples: Apply 10% to 100, and see how each value was calculated. Try 12.5% of 50: the “50 less 12.5%” value is 43.75. Then try 12.5% of 43.75 (shows that before a 12.5% reduction it was 50.) Compare 100 to 110, and see that to go from 100 to 110 is a 10% increase, but to go from 110 back down to 100 is a 9.09% decrease (not a 10% decrease)
