4185.71% is the change from 21 to 900
Calculation steps:
[( 900 - 21 ) ÷ 21] x 100 = 4185.71%
Formula
Percentage change = [(900 - 21) / 21] x 100
Subtract the new number by the original number
900 - 21 = 879
879 ÷ 21 = 41.857142857142854
41.857142857142854 x 100 = 4185.71%