-27.27% is the change from 77 to 56
Calculation steps:
[( 56 - 77 ) ÷ 77] x 100 = -27.27%
Formula
Percentage change = [(56 - 77) / 77] x 100
Subtract the new number by the original number
56 - 77 = -21
-21 ÷ 77 = -0.2727272727272727
-0.2727272727272727 x 100 = -27.27%