-40.78% is the change from 537 to 318
Calculation steps:
[( 318 - 537 ) ÷ 537] x 100 = -40.78%
Formula
Percentage change = [(318 - 537) / 537] x 100
Subtract the new number by the original number
318 - 537 = -219
-219 ÷ 537 = -0.40782122905027934
-0.40782122905027934 x 100 = -40.78%