385.71% is the change from 21 to 102
Calculation steps:
[( 102 - 21 ) ÷ 21] x 100 = 385.71%
Formula
Percentage change = [(102 - 21) / 21] x 100
Subtract the new number by the original number
102 - 21 = 81
81 ÷ 21 = 3.857142857142857
3.857142857142857 x 100 = 385.71%