-31.2% is the change from 577 to 397
Calculation steps:
[( 397 - 577 ) ÷ 577] x 100 = -31.2%
Formula
Percentage change = [(397 - 577) / 577] x 100
Subtract the new number by the original number
397 - 577 = -180
-180 ÷ 577 = -0.3119584055459272
-0.3119584055459272 x 100 = -31.2%