138.38% is the change from 271 to 646
Calculation steps:
[( 646 - 271 ) ÷ 271] x 100 = 138.38%
Formula
Percentage change = [(646 - 271) / 271] x 100
Subtract the new number by the original number
646 - 271 = 375
375 ÷ 271 = 1.3837638376383763
1.3837638376383763 x 100 = 138.38%