-83.16% is the change from 588 to 99
Calculation steps:
[( 99 - 588 ) ÷ 588] x 100 = -83.16%
Formula
Percentage change = [(99 - 588) / 588] x 100
Subtract the new number by the original number
99 - 588 = -489
-489 ÷ 588 = -0.8316326530612245
-0.8316326530612245 x 100 = -83.16%