-19.47% is the change from 678 to 546
Calculation steps:
[( 546 - 678 ) ÷ 678] x 100 = -19.47%
Formula
Percentage change = [(546 - 678) / 678] x 100
Subtract the new number by the original number
546 - 678 = -132
-132 ÷ 678 = -0.19469026548672566
-0.19469026548672566 x 100 = -19.47%