4242.86% is the change from 21 to 912
Calculation steps:
[( 912 - 21 ) ÷ 21] x 100 = 4242.86%
Formula
Percentage change = [(912 - 21) / 21] x 100
Subtract the new number by the original number
912 - 21 = 891
891 ÷ 21 = 42.42857142857143
42.42857142857143 x 100 = 4242.86%