-72.3% is the change from 278 to 77
Calculation steps:
[( 77 - 278 ) ÷ 278] x 100 = -72.3%
Formula
Percentage change = [(77 - 278) / 278] x 100
Subtract the new number by the original number
77 - 278 = -201
-201 ÷ 278 = -0.7230215827338129
-0.7230215827338129 x 100 = -72.3%