54.62% is the change from 639 to 988
Calculation steps:
[( 988 - 639 ) ÷ 639] x 100 = 54.62%
Formula
Percentage change = [(988 - 639) / 639] x 100
Subtract the new number by the original number
988 - 639 = 349
349 ÷ 639 = 0.5461658841940532
0.5461658841940532 x 100 = 54.62%