-86.73% is the change from 663 to 88
Calculation steps:
[( 88 - 663 ) ÷ 663] x 100 = -86.73%
Formula
Percentage change = [(88 - 663) / 663] x 100
Subtract the new number by the original number
88 - 663 = -575
-575 ÷ 663 = -0.8672699849170438
-0.8672699849170438 x 100 = -86.73%