a recipe that serves 9 people requires 1 1/3 cups sugar using this recipe how many cups of sugar are needed to serve 15 people?
2 answers:
Answer:
<u>2 2/9 cups of sugar</u>
Step-by-step explanation:
Cups needed to serve 9 people = <u>1 1/3 cups</u>
We can say that the <u>number of people</u> is directly proportional to the <u>number of cups of sugar</u> used.
Hence, taking them in proportion :
⇒
⇒ 9x = 15 (1 + 1/3)
⇒ 9x = 15 + 5
⇒ 9x = 20
⇒ x = 20/9
⇒ x = <u>2 2/9 cups of sugar</u>
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Answer:
72%
Step-by-step explanation:
Start by turning both percentages into decimals. To do this take the percent and divide it by 100. So, 60% = 60/100 or .6 and 80% = 80/100 or .8.
Next the student has already completed 20 quizzes. So, 50-20=30 remaining quizzes.
Quizzes already taken:
= 12 passed quizzes.
The remaining quizzes for the school year:
= 24 quizzes
So, Finally add them both together and divide by the total amount of quizzes:
12+24
= 36 passed quizzes
=.72
Now to convert it back into a fraction you multiply the decimal by 100.
= 72%