314.29% is the change from 21 to 87
Calculation steps:
[( 87 - 21 ) ÷ 21] x 100 = 314.29%
Formula
Percentage change = [(87 - 21) / 21] x 100
Subtract the new number by the original number
87 - 21 = 66
66 ÷ 21 = 3.142857142857143
3.142857142857143 x 100 = 314.29%