化简比
3/4:5/12
=3/4×12/5
=9/5或1.8
3又1/3:0.7
=10/3÷7/10
=10/3x10/7
=100/21
解方程
2/7:X=11/14
11/14*X=2/7
X=2/7x14/11
X=4/11
X:5/4=3又3/5
X=5/4 x 18/5
X=9/2
化简比
3/4:5/12
=3/4×12/5
=9/5或1.8
3又1/3:0.7
=10/3÷7/10
=10/3x10/7
=100/21
解方程
2/7:X=11/14
11/14*X=2/7
X=2/7x14/11
X=4/11
X:5/4=3又3/5
X=5/4 x 18/5
X=9/2