136.16% is the change from 271 to 640
Calculation steps:
[( 640 - 271 ) ÷ 271] x 100 = 136.16%
Formula
Percentage change = [(640 - 271) / 271] x 100
Subtract the new number by the original number
640 - 271 = 369
369 ÷ 271 = 1.3616236162361623
1.3616236162361623 x 100 = 136.16%