-33.4% is the change from 491 to 327
Calculation steps:
[( 327 - 491 ) ÷ 491] x 100 = -33.4%
Formula
Percentage change = [(327 - 491) / 491] x 100
Subtract the new number by the original number
327 - 491 = -164
-164 ÷ 491 = -0.3340122199592668
-0.3340122199592668 x 100 = -33.4%