150% is the change from 396 to 990
Calculation steps:
[( 990 - 396 ) ÷ 396] x 100 = 150%
Formula
Percentage change = [(990 - 396) / 396] x 100
Subtract the new number by the original number
990 - 396 = 594
594 ÷ 396 = 1.5
1.5 x 100 = 150%
Example