-19.94% is the change from 677 to 542
Calculation steps:
[( 542 - 677 ) ÷ 677] x 100 = -19.94%
Formula
Percentage change = [(542 - 677) / 677] x 100
Subtract the new number by the original number
542 - 677 = -135
-135 ÷ 677 = -0.19940915805022155
-0.19940915805022155 x 100 = -19.94%