134.6% is the change from 422 to 990
Calculation steps:
[( 990 - 422 ) ÷ 422] x 100 = 134.6%
Formula
Percentage change = [(990 - 422) / 422] x 100
Subtract the new number by the original number
990 - 422 = 568
568 ÷ 422 = 1.3459715639810426
1.3459715639810426 x 100 = 134.6%