-77.14% is the change from 350 to 80
Calculation steps:
[( 80 - 350 ) ÷ 350] x 100 = -77.14%
Formula
Percentage change = [(80 - 350) / 350] x 100
Subtract the new number by the original number
80 - 350 = -270
-270 ÷ 350 = -0.7714285714285715
-0.7714285714285715 x 100 = -77.14%