To find x% of an amount A you calculate A*x/100.
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Change the percentage to a fraction by dividing it by 100, then divide the percentage amount by this quotient to find the full amount. For example, 20 % of x = 10; 20 % = 0.20; 10/0.20 = 50.
(New amount - Original amt) / Original amount = loss percentage. saurabh K.
to find percentage you must divide amount by total amount and multiply that by 100 so 70/200x100=35%
It depends on whether you want to find the percentage that 10 dollars represents of some other quantity, or the amount represented by a given percentage of 10 dollars.
convert % to a decimal (divide by 100) call this p Final amount = cost(1 + p)