-49.27% is the change from 548 to 278
Calculation steps:
[( 278 - 548 ) ÷ 548] x 100 = -49.27%
Formula
Percentage change = [(278 - 548) / 548] x 100
Subtract the new number by the original number
278 - 548 = -270
-270 ÷ 548 = -0.4927007299270073
-0.4927007299270073 x 100 = -49.27%