50.68% is the change from 657 to 990
Calculation steps:
[( 990 - 657 ) ÷ 657] x 100 = 50.68%
Formula
Percentage change = [(990 - 657) / 657] x 100
Subtract the new number by the original number
990 - 657 = 333
333 ÷ 657 = 0.5068493150684932
0.5068493150684932 x 100 = 50.68%