Answer:
20%, 1/5, 0.2
Explanation:
Verify each case
case 1) we have
20%, 1/4, 0.2
we know that
![20\%=20/100=0.20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/1soohikttu6ns6vwezoiahec79w7adwkgs.png)
![(1)/(4)=0.25](https://img.qammunity.org/2020/formulas/health/high-school/r82nicixgizumw833cll8nrqalm6mu5mdg.png)
therefore
![0.20=0.20\\eq0.25](https://img.qammunity.org/2020/formulas/mathematics/middle-school/191jktwpvu45kh9jvp7xhh6t6qpdbikl8b.png)
This group not represents equivalent ratios
case 2) we have
25%, 1/4, 0.2
we know that
![25\%=25/100=0.25](https://img.qammunity.org/2020/formulas/mathematics/high-school/fs4x3gp8up4bdesmqjp7jf9mgihl02jv03.png)
![(1)/(4)=0.25](https://img.qammunity.org/2020/formulas/health/high-school/r82nicixgizumw833cll8nrqalm6mu5mdg.png)
therefore
![0.25=0.25\\eq0.20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/fkpzlvyztfcx72p2cvvrnmsc80v9xe1fq8.png)
This group not represents equivalent ratios
case 3) we have
20%, 1/5, 0.2
we know that
![20\%=20/100=0.20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/1soohikttu6ns6vwezoiahec79w7adwkgs.png)
![(1)/(5)=0.20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/kfjhnlim6eexyl5ry4n5iotzkv70vg1xs0.png)
therefore
![0.20=0.20=0.20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/i4sj3pfonfaq0lx0kjm9cld5bfebjvcrhw.png)
This group represents equivalent ratios
case 4) we have
25%, 1/5, 0.2
we know that
![25\%=25/100=0.25](https://img.qammunity.org/2020/formulas/mathematics/high-school/fs4x3gp8up4bdesmqjp7jf9mgihl02jv03.png)
![(1)/(5)=0.20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/kfjhnlim6eexyl5ry4n5iotzkv70vg1xs0.png)
therefore
![0.25\\eq0.20=0.20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/tax5uzf2s0m7nncdarxvojx2we9ndly97c.png)
This group not represents equivalent ratios