-19.91% is the change from 427 to 342
Calculation steps:
[( 342 - 427 ) ÷ 427] x 100 = -19.91%
Formula
Percentage change = [(342 - 427) / 427] x 100
Subtract the new number by the original number
342 - 427 = -85
-85 ÷ 427 = -0.1990632318501171
-0.1990632318501171 x 100 = -19.91%