44.38% is the change from 640 to 924
Calculation steps:
[( 924 - 640 ) ÷ 640] x 100 = 44.38%
Formula
Percentage change = [(924 - 640) / 640] x 100
Subtract the new number by the original number
924 - 640 = 284
284 ÷ 640 = 0.44375
0.44375 x 100 = 44.38%