763.51% is the change from 74 to 639
Calculation steps:
[( 639 - 74 ) ÷ 74] x 100 = 763.51%
Formula
Percentage change = [(639 - 74) / 74] x 100
Subtract the new number by the original number
639 - 74 = 565
565 ÷ 74 = 7.635135135135135
7.635135135135135 x 100 = 763.51%