49.7% is the change from 660 to 988
Calculation steps:
[( 988 - 660 ) ÷ 660] x 100 = 49.7%
Formula
Percentage change = [(988 - 660) / 660] x 100
Subtract the new number by the original number
988 - 660 = 328
328 ÷ 660 = 0.49696969696969695
0.49696969696969695 x 100 = 49.7%