-79.43% is the change from 491 to 101
Calculation steps:
[( 101 - 491 ) ÷ 491] x 100 = -79.43%
Formula
Percentage change = [(101 - 491) / 491] x 100
Subtract the new number by the original number
101 - 491 = -390
-390 ÷ 491 = -0.7942973523421588
-0.7942973523421588 x 100 = -79.43%