=(800×0.7)/(1.25×0.7)-4.8/(5×6)
=800/1.25-(0.8×6)/(5×6)
=800/(10÷8)-0.8/5
=(800×8)/10-(0.8×2)/10
=【6400-1.6】/10
=6398.4/10
=639.84
=(800×0.7)/(1.25×0.7)-4.8/(5×6)
=800/1.25-(0.8×6)/(5×6)
=800/(10÷8)-0.8/5
=(800×8)/10-(0.8×2)/10
=【6400-1.6】/10
=6398.4/10
=639.84