613.7% is the change from 73 to 521
Calculation steps:
[( 521 - 73 ) ÷ 73] x 100 = 613.7%
Formula
Percentage change = [(521 - 73) / 73] x 100
Subtract the new number by the original number
521 - 73 = 448
448 ÷ 73 = 6.136986301369863
6.136986301369863 x 100 = 613.7%