-40% is the change from 545 to 327
Calculation steps:
[( 327 - 545 ) ÷ 545] x 100 = -40%
Formula
Percentage change = [(327 - 545) / 545] x 100
Subtract the new number by the original number
327 - 545 = -218
-218 ÷ 545 = -0.4
-0.4 x 100 = -40%
Example