6又8/17×2/23+3/17×9/23 78÷78又78/79

6又8/17×2/23+3/17×9/23 78÷78又78/79
6又8/17×2/23+3/17×9/23 78÷78又78/79

6又8/17×2/23+3/17×9/23 78÷78又78/79
110/17×2/23+3/17×9/23
=(220+27)/(17*23)
=247/391
78÷(6240/79)
=78*79/6240
=0.9875

247/391
79/80