-86.85% is the change from 593 to 78
Calculation steps:
[( 78 - 593 ) ÷ 593] x 100 = -86.85%
Formula
Percentage change = [(78 - 593) / 593] x 100
Subtract the new number by the original number
78 - 593 = -515
-515 ÷ 593 = -0.8684654300168634
-0.8684654300168634 x 100 = -86.85%