There are 480 dishes that need to be rinsed. Juan can rinse them in 80 minutes by himself. It will his friend Kevin 120 minutes
to rinse these dishes. How long will it take them if they rinse these 480 dishes together ?
1 answer:
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Let's start out by tripling the original recipe to see how much butter Angie needs.
So we need
cups of butter, but Angie only has 
. Let's subtract what Angie has from the total to see how much more she needs.
we will need the least common denominator for both fractions
So Angie need
cups more of butter for the recipe.
So we need
we will need the least common denominator for both fractions
So Angie need