-29.89% is the change from 87 to 61
Calculation steps:
[( 61 - 87 ) ÷ 87] x 100 = -29.89%
Formula
Percentage change = [(61 - 87) / 87] x 100
Subtract the new number by the original number
61 - 87 = -26
-26 ÷ 87 = -0.2988505747126437
-0.2988505747126437 x 100 = -29.89%