521.36% is the change from 103 to 640
Calculation steps:
[( 640 - 103 ) ÷ 103] x 100 = 521.36%
Formula
Percentage change = [(640 - 103) / 103] x 100
Subtract the new number by the original number
640 - 103 = 537
537 ÷ 103 = 5.213592233009709
5.213592233009709 x 100 = 521.36%