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Ratios - Calculate Total from Total Ratio (Level 1)

This math topic focuses on practicing the calculation of total quantities based on given ratios. It covers problems that involve determining the total number of items, such as balls, kids, or pets, using ratios of specific subgroups to the whole. For example, the ratio of soccer balls to all balls, or the ratio of girls to all kids. Each problem provides part of the ratio and asks for the total number based on this information. The skills developed here are essential for understanding proportional relationships and fraction-to-whole relationships.

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

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Ratios - Calculate Total from Total Ratio

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


What is the total number of pets?

cats : 5dogs : ?(dogs:all pets) = (2:7)\text{cats : 5}\\\text{dogs : ?}\\\text{(dogs:all pets) = (2:7)}\\

Ratios - Calculate Total from Total Ratio Worksheet

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Math worksheet on 'Ratios - Calculate Total from Total Ratio (Level 1)'. Part of a broader unit on 'Rates and Ratios - Practice' Learn online: app.mobius.academy/math/units/rates_and_ratios_practice/
1
What is the total number of pets?
A LaTex expression showing \text{cats : 4}\\\text{dogs : ?}\\\text{(dogs:all pets) = (3:7)}\\
a
8
b
1
c
11
d
7
2
What is the total number of kids?
A LaTex expression showing \text{boys : ?}\\\text{girls : 3}\\\text{(boys:all kids) = (4:7)}\\
a
11
b
8
c
7
d
15
3
What is the total number of pets?
A LaTex expression showing \text{cats : 3}\\\text{dogs : ?}\\\text{(dogs:all pets) = (4:7)}\\
a
3
b
7
c
15
d
2
4
What is the total number of pets?
A LaTex expression showing \text{cats : ?}\\\text{dogs : 3}\\\text{(cats:all pets) = (2:5)}\\
a
14
b
5
c
8
d
12
5
What is the total number of balls?
A LaTex expression showing \text{tennis balls : 4}\\\text{soccer balls : ?}\\\text{(soccer:all balls) = (3:7)}\\
a
7
b
13
c
12
d
4
6
What is the total number of pets?
A LaTex expression showing \text{cats : ?}\\\text{dogs : 2}\\\text{(cats:all pets) = (3:5)}\\
a
5
b
7
c
12
d
1
7
What is the total number of balls?
A LaTex expression showing \text{tennis balls : ?}\\\text{soccer balls : 4}\\\text{(tennis:all balls) = (3:7)}\\
a
12
b
7
c
10
d
6