77.3% is the change from 423 to 750
Calculation steps:
[( 750 - 423 ) ÷ 423] x 100 = 77.3%
Formula
Percentage change = [(750 - 423) / 423] x 100
Subtract the new number by the original number
750 - 423 = 327
327 ÷ 423 = 0.7730496453900709
0.7730496453900709 x 100 = 77.3%