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Vinvika [58]
3 years ago
11

Roger mixed 5/8 cup of red paint with 2/5 cup of yellow paint. How much red paint is needed (using the same ratio) if he wants t

o use 1 cup yellow paint
Mathematics
1 answer:
never [62]3 years ago
5 0
Set up the ratio as fractions

(5/8) cup red / (2/5) cup yellow = r amount of red / 1 cup yellow

Then cross multiply the numbers and set up as a equation like this

(5/8) × 1 = (2/5) × r

(5/8) = (2/5)r

Multiply both sides of the equation by (5/2) to get rid of the fraction and solve for r

(5/2) × (5/8) = (2/5)r × <span>(5/2)

25/16 = r

Reduce down to 5/4 or change to a mixed number

1 and 1/4  cups = r</span>
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