-19.39% is the change from 428 to 345
Calculation steps:
[( 345 - 428 ) ÷ 428] x 100 = -19.39%
Formula
Percentage change = [(345 - 428) / 428] x 100
Subtract the new number by the original number
345 - 428 = -83
-83 ÷ 428 = -0.1939252336448598
-0.1939252336448598 x 100 = -19.39%