-68.23% is the change from 491 to 156
Calculation steps:
[( 156 - 491 ) ÷ 491] x 100 = -68.23%
Formula
Percentage change = [(156 - 491) / 491] x 100
Subtract the new number by the original number
156 - 491 = -335
-335 ÷ 491 = -0.6822810590631364
-0.6822810590631364 x 100 = -68.23%