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Ratios - Calculate Value from Item Ratio (Level 2)

This math topic focuses on calculating values from given item ratios, a fundamental concept in the broader unit of rates and ratios. Students must determine the unknown number of items in a ratio, like figuring out the number of dogs when given the ratio of cats to dogs and the number of cats. The questions involve various scenarios, ranging from animals to boys and girls, by applying the concepts of proportional relationships. Each question provides multiple-choice answers, challenging students to apply their understanding of ratios to find the correct figure.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Ratios - Calculate Value from Item Ratio

Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.


How many boys are there?

boys : ?girls : 20(boys:girls) = (2:5)\text{boys : ?}\\\text{girls : 20}\\\text{(boys:girls) = (2:5)}\\

Ratios - Calculate Value from Item Ratio Worksheet

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Math worksheet on 'Ratios - Calculate Value from Item Ratio (Level 2)'. Part of a broader unit on 'Rates and Ratios - Practice' Learn online: app.mobius.academy/math/units/rates_and_ratios_practice/
1
How many soccer balls are there?
A LaTex expression showing \text{tennis balls : 12}\\\text{soccer balls : ?}\\\text{(tennis:soccer) = (4:5)}\\
a
18
b
21
c
20
d
15
2
A LaTex expression showing \text{cats : 4}\\\text{dogs : ?}\\\text{(cats:dogs) = (2:5)}\\
How many dogs are there?
a
19
b
7
c
10
d
15
3
How many soccer balls are there?
A LaTex expression showing \text{tennis balls : 20}\\\text{soccer balls : ?}\\\text{(tennis:soccer) = (5:3)}\\
a
16
b
4
c
18
d
12
4
A LaTex expression showing \text{boys : ?}\\\text{girls : 6}\\\text{(boys:girls) = (3:2)}\\
How many boys are there?
a
9
b
1
c
12
d
3
5
A LaTex expression showing \text{cats : 6}\\\text{dogs : ?}\\\text{(cats:dogs) = (2:5)}\\
How many dogs are there?
a
6
b
16
c
23
d
15
6
A LaTex expression showing \text{cats : 10}\\\text{dogs : ?}\\\text{(cats:dogs) = (5:2)}\\
How many dogs are there?
a
5
b
4
c
10
d
12
7
A LaTex expression showing \text{boys : ?}\\\text{girls : 20}\\\text{(boys:girls) = (2:5)}\\
How many boys are there?
a
6
b
8
c
3
d
2