-77.27% is the change from 308 to 70
Calculation steps:
[( 70 - 308 ) ÷ 308] x 100 = -77.27%
Formula
Percentage change = [(70 - 308) / 308] x 100
Subtract the new number by the original number
70 - 308 = -238
-238 ÷ 308 = -0.7727272727272727
-0.7727272727272727 x 100 = -77.27%