-57.87% is the change from 997 to 420
Calculation steps:
[( 420 - 997 ) ÷ 997] x 100 = -57.87%
Formula
Percentage change = [(420 - 997) / 997] x 100
Subtract the new number by the original number
420 - 997 = -577
-577 ÷ 997 = -0.5787362086258776
-0.5787362086258776 x 100 = -57.87%