-9.58% is the change from 428 to 387
Calculation steps:
[( 387 - 428 ) ÷ 428] x 100 = -9.58%
Formula
Percentage change = [(387 - 428) / 428] x 100
Subtract the new number by the original number
387 - 428 = -41
-41 ÷ 428 = -0.09579439252336448
-0.09579439252336448 x 100 = -9.58%