52.17% is the change from 276 to 420
Calculation steps:
[( 420 - 276 ) ÷ 276] x 100 = 52.17%
Formula
Percentage change = [(420 - 276) / 276] x 100
Subtract the new number by the original number
420 - 276 = 144
144 ÷ 276 = 0.5217391304347826
0.5217391304347826 x 100 = 52.17%