126.3% is the change from 270 to 611
Calculation steps:
[( 611 - 270 ) ÷ 270] x 100 = 126.3%
Formula
Percentage change = [(611 - 270) / 270] x 100
Subtract the new number by the original number
611 - 270 = 341
341 ÷ 270 = 1.262962962962963
1.262962962962963 x 100 = 126.3%