604.05% is the change from 74 to 521
Calculation steps:
[( 521 - 74 ) ÷ 74] x 100 = 604.05%
Formula
Percentage change = [(521 - 74) / 74] x 100
Subtract the new number by the original number
521 - 74 = 447
447 ÷ 74 = 6.04054054054054
6.04054054054054 x 100 = 604.05%