-19.03% is the change from 678 to 549
Calculation steps:
[( 549 - 678 ) ÷ 678] x 100 = -19.03%
Formula
Percentage change = [(549 - 678) / 678] x 100
Subtract the new number by the original number
549 - 678 = -129
-129 ÷ 678 = -0.1902654867256637
-0.1902654867256637 x 100 = -19.03%