-45.74% is the change from 938 to 509
Calculation steps:
[( 509 - 938 ) ÷ 938] x 100 = -45.74%
Formula
Percentage change = [(509 - 938) / 938] x 100
Subtract the new number by the original number
509 - 938 = -429
-429 ÷ 938 = -0.4573560767590618
-0.4573560767590618 x 100 = -45.74%