-57.7% is the change from 643 to 272
Calculation steps:
[( 272 - 643 ) ÷ 643] x 100 = -57.7%
Formula
Percentage change = [(272 - 643) / 643] x 100
Subtract the new number by the original number
272 - 643 = -371
-371 ÷ 643 = -0.5769828926905132
-0.5769828926905132 x 100 = -57.7%