633.8% is the change from 71 to 521
Calculation steps:
[( 521 - 71 ) ÷ 71] x 100 = 633.8%
Formula
Percentage change = [(521 - 71) / 71] x 100
Subtract the new number by the original number
521 - 71 = 450
450 ÷ 71 = 6.338028169014085
6.338028169014085 x 100 = 633.8%