0.8÷(4/5×1.25)÷(0.64-1/25)+1.2×0.5÷4/5=0.8÷（4/5x5/4）÷（0.64-0.04）+0.6÷0.8=0.8÷1÷0.6+3/4=4/3+3/4=16/12+9/12=25/12
0.8÷(4/5×1.25)÷(0.64-1/25)+1.2×0.5÷4/5=0.8÷1÷0.6+0.6÷0.8=4/3+3/4=25/12
25/12
