-48.99% is the change from 545 to 278
Calculation steps:
[( 278 - 545 ) ÷ 545] x 100 = -48.99%
Formula
Percentage change = [(278 - 545) / 545] x 100
Subtract the new number by the original number
278 - 545 = -267
-267 ÷ 545 = -0.48990825688073397
-0.48990825688073397 x 100 = -48.99%