-56.7% is the change from 970 to 420
Calculation steps:
[( 420 - 970 ) ÷ 970] x 100 = -56.7%
Formula
Percentage change = [(420 - 970) / 970] x 100
Subtract the new number by the original number
420 - 970 = -550
-550 ÷ 970 = -0.5670103092783505
-0.5670103092783505 x 100 = -56.7%