-87.9% is the change from 471 to 57
Calculation steps:
[( 57 - 471 ) ÷ 471] x 100 = -87.9%
Formula
Percentage change = [(57 - 471) / 471] x 100
Subtract the new number by the original number
57 - 471 = -414
-414 ÷ 471 = -0.8789808917197452
-0.8789808917197452 x 100 = -87.9%