-82.41% is the change from 324 to 57
Calculation steps:
[( 57 - 324 ) ÷ 324] x 100 = -82.41%
Formula
Percentage change = [(57 - 324) / 324] x 100
Subtract the new number by the original number
57 - 324 = -267
-267 ÷ 324 = -0.8240740740740741
-0.8240740740740741 x 100 = -82.41%