-19.88% is the change from 347 to 278
Calculation steps:
[( 278 - 347 ) ÷ 347] x 100 = -19.88%
Formula
Percentage change = [(278 - 347) / 347] x 100
Subtract the new number by the original number
278 - 347 = -69
-69 ÷ 347 = -0.1988472622478386
-0.1988472622478386 x 100 = -19.88%