44.58% is the change from 637 to 921
Calculation steps:
[( 921 - 637 ) ÷ 637] x 100 = 44.58%
Formula
Percentage change = [(921 - 637) / 637] x 100
Subtract the new number by the original number
921 - 637 = 284
284 ÷ 637 = 0.44583987441130296
0.44583987441130296 x 100 = 44.58%