56.3% is the change from 270 to 422
Calculation steps:
[( 422 - 270 ) ÷ 270] x 100 = 56.3%
Formula
Percentage change = [(422 - 270) / 270] x 100
Subtract the new number by the original number
422 - 270 = 152
152 ÷ 270 = 0.562962962962963
0.562962962962963 x 100 = 56.3%