-67.21% is the change from 491 to 161
Calculation steps:
[( 161 - 491 ) ÷ 491] x 100 = -67.21%
Formula
Percentage change = [(161 - 491) / 491] x 100
Subtract the new number by the original number
161 - 491 = -330
-330 ÷ 491 = -0.6720977596741344
-0.6720977596741344 x 100 = -67.21%