137.64% is the change from 271 to 644
Calculation steps:
[( 644 - 271 ) ÷ 271] x 100 = 137.64%
Formula
Percentage change = [(644 - 271) / 271] x 100
Subtract the new number by the original number
644 - 271 = 373
373 ÷ 271 = 1.3763837638376384
1.3763837638376384 x 100 = 137.64%