527.45% is the change from 102 to 640
Calculation steps:
[( 640 - 102 ) ÷ 102] x 100 = 527.45%
Formula
Percentage change = [(640 - 102) / 102] x 100
Subtract the new number by the original number
640 - 102 = 538
538 ÷ 102 = 5.2745098039215685
5.2745098039215685 x 100 = 527.45%