12700% is the change from 5 to 640
Calculation steps:
[( 640 - 5 ) ÷ 5] x 100 = 12700%
Formula
Percentage change = [(640 - 5) / 5] x 100
Subtract the new number by the original number
640 - 5 = 635
635 ÷ 5 = 127
127 x 100 = 12700%
Example