4 / 5 * 3.5 + 5.5 * 80% + 0.8 simple operation

4 / 5 * 3.5 + 5.5 * 80% + 0.8 simple operation

80%=4/5=0.8
4/5*3.5+5.5*80%+0.8
=4/5*(3.5+5.5+1)
=4/5*10
=8