Answer:
1. Ratio RP with TS
15 : 12
To resolve this both number must be divided with the same number , in this term , I will divided with 3.
15/3 : 12/3
5 : 4
The ratio RP with TS is 5:4
2. Rati PS with SQ
5 : 20
To resolve this both number must be divided with the same number , in this term , I will divided with 5.
5/5 : 20/5
1 : 4
The ratio PS with SQ is 1:4
Hope that was help you