54.15% is the change from 639 to 985
Calculation steps:
[( 985 - 639 ) ÷ 639] x 100 = 54.15%
Formula
Percentage change = [(985 - 639) / 639] x 100
Subtract the new number by the original number
985 - 639 = 346
346 ÷ 639 = 0.5414710485133021
0.5414710485133021 x 100 = 54.15%