-42.38% is the change from 538 to 310
Calculation steps:
[( 310 - 538 ) ÷ 538] x 100 = -42.38%
Formula
Percentage change = [(310 - 538) / 538] x 100
Subtract the new number by the original number
310 - 538 = -228
-228 ÷ 538 = -0.42379182156133827
-0.42379182156133827 x 100 = -42.38%