-91.2% is the change from 648 to 57
Calculation steps:
[( 57 - 648 ) ÷ 648] x 100 = -91.2%
Formula
Percentage change = [(57 - 648) / 648] x 100
Subtract the new number by the original number
57 - 648 = -591
-591 ÷ 648 = -0.9120370370370371
-0.9120370370370371 x 100 = -91.2%