53.52% is the change from 639 to 981
Calculation steps:
[( 981 - 639 ) ÷ 639] x 100 = 53.52%
Formula
Percentage change = [(981 - 639) / 639] x 100
Subtract the new number by the original number
981 - 639 = 342
342 ÷ 639 = 0.5352112676056338
0.5352112676056338 x 100 = 53.52%