-87.71% is the change from 659 to 81
Calculation steps:
[( 81 - 659 ) ÷ 659] x 100 = -87.71%
Formula
Percentage change = [(81 - 659) / 659] x 100
Subtract the new number by the original number
81 - 659 = -578
-578 ÷ 659 = -0.8770864946889226
-0.8770864946889226 x 100 = -87.71%