-73.56% is the change from 87 to 23
Calculation steps:
[( 23 - 87 ) ÷ 87] x 100 = -73.56%
Formula
Percentage change = [(23 - 87) / 87] x 100
Subtract the new number by the original number
23 - 87 = -64
-64 ÷ 87 = -0.735632183908046
-0.735632183908046 x 100 = -73.56%