-84.89% is the change from 655 to 99
Calculation steps:
[( 99 - 655 ) ÷ 655] x 100 = -84.89%
Formula
Percentage change = [(99 - 655) / 655] x 100
Subtract the new number by the original number
99 - 655 = -556
-556 ÷ 655 = -0.8488549618320611
-0.8488549618320611 x 100 = -84.89%