770.27% is the change from 74 to 644
Calculation steps:
[( 644 - 74 ) ÷ 74] x 100 = 770.27%
Formula
Percentage change = [(644 - 74) / 74] x 100
Subtract the new number by the original number
644 - 74 = 570
570 ÷ 74 = 7.702702702702703
7.702702702702703 x 100 = 770.27%