(三分之二减九分之四乘以八分之三)除以十六分之七
=(2/3-4/9×3/8)÷7/16
=(4/6-1/6)×16/7
=1/2×16/7
=8/7
十四分之九乘以49—十四分之九除以四十九分之一
=9/14×49-9/14÷1/49
=9/14×49-9/14×49
=0
2—(二分之一+二十五分之一)减五十分之二十三
=2-1/2-1/25-23/50
=2-25/50-2/50-23/50
=2-1
=1
五分之三/[(四分之三—三分之二)除以六分之五】
=3/5÷(3/4-2/3)÷5/6
=3/5÷1/12÷5/6
=3/5×12×6/5
=216/25
=(3分之2-6分之1)×7分之16
=3分之2×7分之16-6分之1×7分之16
=21分之32-21分之8
=7分之8
﹙2/3-4/9×3/8﹚÷7/16
=﹙2/3-1/6﹚÷7/16
=﹙2/3-1/6﹚×16/7
=2/3×16/7-1/6×16/7
=32/21-8/21
=8/7