56.03% is the change from 423 to 660
Calculation steps:
[( 660 - 423 ) ÷ 423] x 100 = 56.03%
Formula
Percentage change = [(660 - 423) / 423] x 100
Subtract the new number by the original number
660 - 423 = 237
237 ÷ 423 = 0.5602836879432624
0.5602836879432624 x 100 = 56.03%