-72% is the change from 275 to 77
Calculation steps:
[( 77 - 275 ) ÷ 275] x 100 = -72%
Formula
Percentage change = [(77 - 275) / 275] x 100
Subtract the new number by the original number
77 - 275 = -198
-198 ÷ 275 = -0.72
-0.72 x 100 = -72%
Example