4271.43% is the change from 21 to 918
Calculation steps:
[( 918 - 21 ) ÷ 21] x 100 = 4271.43%
Formula
Percentage change = [(918 - 21) / 21] x 100
Subtract the new number by the original number
918 - 21 = 897
897 ÷ 21 = 42.714285714285715
42.714285714285715 x 100 = 4271.43%