51.85% is the change from 270 to 410
Calculation steps:
[( 410 - 270 ) ÷ 270] x 100 = 51.85%
Formula
Percentage change = [(410 - 270) / 270] x 100
Subtract the new number by the original number
410 - 270 = 140
140 ÷ 270 = 0.5185185185185185
0.5185185185185185 x 100 = 51.85%