-22% is the change from 509 to 397
Calculation steps:
[( 397 - 509 ) ÷ 509] x 100 = -22%
Formula
Percentage change = [(397 - 509) / 509] x 100
Subtract the new number by the original number
397 - 509 = -112
-112 ÷ 509 = -0.2200392927308448
-0.2200392927308448 x 100 = -22%