43.01% is the change from 644 to 921
Calculation steps:
[( 921 - 644 ) ÷ 644] x 100 = 43.01%
Formula
Percentage change = [(921 - 644) / 644] x 100
Subtract the new number by the original number
921 - 644 = 277
277 ÷ 644 = 0.4301242236024845
0.4301242236024845 x 100 = 43.01%