Proportion help

[math-tutor]

How would you best explain to a pupil how to solve this proportion problem?

We made a bowl of punch using lemonade and soda pop. The ratio of
lemonade to soda pop is 2:3. If there are 25 gallons of punch, how much
lemonade is needed? _____ gallons.

 

[Gene]

Since the ratio is 2:3 for every 5 gallons of punch there are 2 of lemonade.
2/5=L/25

 

[math-tutor]

Since the ratio is 2:3 for every 5 gallons of punch there are 2 of lemonade.
2/5=L/25

Wonderful! Thank you very much for your prompt response.

I see now that the best approach is to foster an understanding of part to part and part to whole.