how to calculate percentage of given number?
['Multiply the number by the percent (e.g. 87 * 68 = 5916)', 'Divide the answer by 100 (Move decimal point two places to the left) (e.g. 5916/100 = 59.16)', 'Round to the desired precision (e.g. 59.16 rounded to the nearest whole number = 59)']