The ratio of payment for gas to payment for electricity is 8 : 7
Solution:
Given, Carmen paid a gas and electricity utility bill of $75
The electricity part of the bill was $35
We have to write the ratio of the payment for gas to the payment for electricity.
Now we know that,
Total bill = electricity bill + gas bill
75 = 35 + gas bill
gas bill = 75 – 35
gas bill = 40
Ratio of payment for gas to payment for electricity is given as:

can be written in fraction as a:b
Hence the ratio of payment for gas to payment for electricity is 8 : 7