52.43% is the change from 639 to 974
Calculation steps:
[( 974 - 639 ) ÷ 639] x 100 = 52.43%
Formula
Percentage change = [(974 - 639) / 639] x 100
Subtract the new number by the original number
974 - 639 = 335
335 ÷ 639 = 0.5242566510172144
0.5242566510172144 x 100 = 52.43%