-86.88% is the change from 587 to 77
Calculation steps:
[( 77 - 587 ) ÷ 587] x 100 = -86.88%
Formula
Percentage change = [(77 - 587) / 587] x 100
Subtract the new number by the original number
77 - 587 = -510
-510 ÷ 587 = -0.868824531516184
-0.868824531516184 x 100 = -86.88%