151.85% is the change from 270 to 680
Calculation steps:
[( 680 - 270 ) ÷ 270] x 100 = 151.85%
Formula
Percentage change = [(680 - 270) / 270] x 100
Subtract the new number by the original number
680 - 270 = 410
410 ÷ 270 = 1.5185185185185186
1.5185185185185186 x 100 = 151.85%