-87.58% is the change from 491 to 61
Calculation steps:
[( 61 - 491 ) ÷ 491] x 100 = -87.58%
Formula
Percentage change = [(61 - 491) / 491] x 100
Subtract the new number by the original number
61 - 491 = -430
-430 ÷ 491 = -0.8757637474541752
-0.8757637474541752 x 100 = -87.58%