-18.42% is the change from 342 to 279
Calculation steps:
[( 279 - 342 ) ÷ 342] x 100 = -18.42%
Formula
Percentage change = [(279 - 342) / 342] x 100
Subtract the new number by the original number
279 - 342 = -63
-63 ÷ 342 = -0.18421052631578946
-0.18421052631578946 x 100 = -18.42%