[0.625-(14分之1加7分之3)】除以0.75
=(0.625-0.5)/0.75
=0.125/0.75
=1/8/(3/4)
=1/6
4分之3除以[38分之9乘（6分之五加4分之3)
=3/4/[9/38*(5/6+3/4)]
=3/4/(3/8)
=2还有一道10.74-（12分之7+5.74)10.74-（12分之7+5.74)=10.74-5.74-7/12=5-7/12=60/12-7/12=53/12