52.11% is the change from 639 to 972
Calculation steps:
[( 972 - 639 ) ÷ 639] x 100 = 52.11%
Formula
Percentage change = [(972 - 639) / 639] x 100
Subtract the new number by the original number
972 - 639 = 333
333 ÷ 639 = 0.5211267605633803
0.5211267605633803 x 100 = 52.11%