-9.29% is the change from 538 to 488
Calculation steps:
[( 488 - 538 ) ÷ 538] x 100 = -9.29%
Formula
Percentage change = [(488 - 538) / 538] x 100
Subtract the new number by the original number
488 - 538 = -50
-50 ÷ 538 = -0.09293680297397769
-0.09293680297397769 x 100 = -9.29%