Problem Solving

In problem solving we are learning about proportions and ratios.We have been doing this for about the last 3 weeks with room 16. We all really enjoy doing it. I have learnt problems like 35 ÷ 7

Here is the question: Keahn invited 35 guests to his birthday party, however only 5/7 of the guests were able to come. How many guests were able to attend?

Here is my thinking:

35 divided by 7 = 5 (This shows one seventh)
5/7 of 35 = 25
5 x 5=25

I did this with Lachie and Ethan, Ethan is from Room 16.