-56.11% is the change from 957 to 420
Calculation steps:
[( 420 - 957 ) ÷ 957] x 100 = -56.11%
Formula
Percentage change = [(420 - 957) / 957] x 100
Subtract the new number by the original number
420 - 957 = -537
-537 ÷ 957 = -0.5611285266457681
-0.5611285266457681 x 100 = -56.11%