Answer: 5:3
Explanation:
We know the number of reserved tables is 15.
We know the number of available tables is 10 more than that, so it's 25.
That means the ratio of available tables to reserved tables is 25:15, which can be reduced by finding a GCD, or Greatest Common Denominator. 5 is the largest number that can go into BOTH so just divide both sides by 5 to reduce.
(25÷5):(15÷5)
5:3
Hope that helps!!