-20.53% is the change from 492 to 391
Calculation steps:
[( 391 - 492 ) ÷ 492] x 100 = -20.53%
Formula
Percentage change = [(391 - 492) / 492] x 100
Subtract the new number by the original number
391 - 492 = -101
-101 ÷ 492 = -0.20528455284552846
-0.20528455284552846 x 100 = -20.53%