
Let's solve ~






That's the required result ~
also you can take it's LCM and write it as :

You have to multiply both top and bottom numbers by the same number so 2 equivalent ones would be 30/14 and 45/21.
Answer:
= 186 F
136 F is taken as the steam point
-50 F is taken as the ice point
∴ difference = steam point - ice point
= 136- (-50)
= 186F
The answer is the first and the third figure,attached