Ratio Problems

A ratio is one quantity divided by another quantity.

The ratio of a to b is 6 means

Many ratio problems involve proportions .

Example of Ratio Problem

2 numbers are in the ratio of 6:1, and their difference is 40. What is the smaller number? |

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Find SMALLER

Let S=SMALLER

Let L=LARGER

Given L=S+40

Given L/S=6/1

1L=6S Comment: Expand parentheses

S+40=6S Comment: Substitute S+40 for L in L=6S

Solution S=8 //

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