771.62% is the change from 74 to 645
Calculation steps:
[( 645 - 74 ) ÷ 74] x 100 = 771.62%
Formula
Percentage change = [(645 - 74) / 74] x 100
Subtract the new number by the original number
645 - 74 = 571
571 ÷ 74 = 7.716216216216216
7.716216216216216 x 100 = 771.62%