# 3 part ratio and dealing with decimals

To work out ratios with decimals

Get rid of the decimal.
(We only work in integers.)

By

Keep multiplying all 3 ratios by 10 until decimal disappears.

Example

Simplify the following ratio with decimals.

3:2.4:0.45

Multiply all 3 ratios by 10

3times10:2.4times10:0.45times10

30:24:4.5

Because there is still a decimal in the ratio continue multiplying all 3 ratios by 10.

30times10:24times10:4.5times10

300:240:45

Now we have removed the decimals we can now simplify 300:240:45

(see our section on 3 part ratios - simplify integers)

300:240:45

2, 3, 4, 5....... The first number that will divide into all of the ratio numbers is 3.

300/3:240/3:45/3

100:80:15

3 will not divide into these numbers again, the next number that will is 5.

100/5:80/5:15/5

20:16:3

This ratio will not divide down any further so the answer is.

20:16:3