-18.69% is the change from 428 to 348
Calculation steps:
[( 348 - 428 ) ÷ 428] x 100 = -18.69%
Formula
Percentage change = [(348 - 428) / 428] x 100
Subtract the new number by the original number
348 - 428 = -80
-80 ÷ 428 = -0.18691588785046728
-0.18691588785046728 x 100 = -18.69%