-86.36% is the change from 645 to 88
Calculation steps:
[( 88 - 645 ) ÷ 645] x 100 = -86.36%
Formula
Percentage change = [(88 - 645) / 645] x 100
Subtract the new number by the original number
88 - 645 = -557
-557 ÷ 645 = -0.8635658914728682
-0.8635658914728682 x 100 = -86.36%