Ratios & averages
Use equal parts and totals to find the exact answer.
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Example
Example
Ratio 2:3, total 20. There are 5 equal parts, so the first amount is 8.
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Four ratio questions and four average questions
Scale ratios and find missing values
8 questions · No time limit
- Questions answered
- 0 / 8
- Active time
- 0:00
Follow the parts and totals
Read which amount is known and which is missing. Ratios keep the same order; group averages depend on how many values each group contains.
One way to solve it
Explore the method
Turn a ratio into equal parts, then find the value of one part.
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How this data is usedHelp
Choose one of five answers. The answer locks when selected. Read the method, then choose Next question.
In a ratio, each part has the same value. For an average, recover the total first. When groups have different sizes, weight each mean by its count.
Choose an exact answer. A fraction is a value, not a request to round. In each ratio A:B, A always refers to the first amount.
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About this practice
Learn a method
Divide in a ratioUse equal parts and totals to find the exact answer.
Report a problem
On by default unless you turn it off. Saved choices are kept. Shares starts, completions, replays and error categories. For ChatGPT visits, starts and completions may include the first QuickenBrain page and country. No answers, drawings or names.
How this data is used