52.57% is the change from 643 to 981
Calculation steps:
[( 981 - 643 ) ÷ 643] x 100 = 52.57%
Formula
Percentage change = [(981 - 643) / 643] x 100
Subtract the new number by the original number
981 - 643 = 338
338 ÷ 643 = 0.5256609642301711
0.5256609642301711 x 100 = 52.57%