-57.17% is the change from 997 to 427
Calculation steps:
[( 427 - 997 ) ÷ 997] x 100 = -57.17%
Formula
Percentage change = [(427 - 997) / 997] x 100
Subtract the new number by the original number
427 - 997 = -570
-570 ÷ 997 = -0.571715145436309
-0.571715145436309 x 100 = -57.17%