-70.8% is the change from 274 to 80
Calculation steps:
[( 80 - 274 ) ÷ 274] x 100 = -70.8%
Formula
Percentage change = [(80 - 274) / 274] x 100
Subtract the new number by the original number
80 - 274 = -194
-194 ÷ 274 = -0.708029197080292
-0.708029197080292 x 100 = -70.8%