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The ratio of two numbers is 2:5. If the larger number is 25, what is the smaller number?

2:5 = n:25

2 (25) = 50

50 ÷ 5 = 10

**2:5 = 10:25**

**To check, multiply the means and the extremes. It must be equal.**

5(10) = 2 (25)

50 = 50

**Therefore, the answer is 10.**

Three numbers have a ratio of 1:2:3. If their sum is 30, find the value of the largest number.

1 : 2 : 3 = 30

**1 + 2 + 3 = 6**

30 ÷ 6 = 5

5 (1) = 5

5 (2) = 10

5 (3) = 15

1:2:3 = 5:10:15

**Therefore, the answer is 15.**

Mrs. Sanchez had 2 daughters. She have 30 cookies in all. The ratio of the number of cookies given to her elder daughter to the younger one is 2:3. How many does each of them have?

2 + 3 = 5

30 ÷ 5 = 6

6 (2) = 12

6 (3) = 18

**Therefore, the older have 18 cookies while the younger have 12 cookies. **

Those are just three examples of problems regarding proportion. I hope it help. ☺

The ratio of two numbers is 2:5. If the larger number is 25, what is the smaller number?

2:5 = n:25

2 (25) = 50

50 ÷ 5 = 10

5(10) = 2 (25)

50 = 50

Three numbers have a ratio of 1:2:3. If their sum is 30, find the value of the largest number.

1 : 2 : 3 = 30

30 ÷ 6 = 5

5 (1) = 5

5 (2) = 10

5 (3) = 15

1:2:3 = 5:10:15

Mrs. Sanchez had 2 daughters. She have 30 cookies in all. The ratio of the number of cookies given to her elder daughter to the younger one is 2:3. How many does each of them have?

2 + 3 = 5

30 ÷ 5 = 6

6 (2) = 12

6 (3) = 18

Those are just three examples of problems regarding proportion. I hope it help. ☺