-57.42% is the change from 991 to 422
Calculation steps:
[( 422 - 991 ) ÷ 991] x 100 = -57.42%
Formula
Percentage change = [(422 - 991) / 991] x 100
Subtract the new number by the original number
422 - 991 = -569
-569 ÷ 991 = -0.574167507568113
-0.574167507568113 x 100 = -57.42%