Ratios and unit rates

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Learn it A ratio compares quantities. Equivalent ratios are like equivalent fractions. To share in a ratio a:b, find the value of one part: total ÷ (a + b).

Example: Share 45 stickers in the ratio 2:7.

Total parts: $2 + 7 = 9$.
One part: $45 \div 9 = 5$.
Shares: $2 \times 5 = 10$ and $7 \times 5 = 35$. Check: $10 + 35 = 45$ ✓.

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