# Ratio

Ratio is very similar to proportion in that we are comparing one thing with another. We split ratio into parts and the order of the parts follows the description of the parts in the same order. For example, red, blue and green pens were split in the ratio 4:5:12. That means for every 4 red pens, there were 5 blue ones and 12 green ones. So the order of the description and order of the numbers given in a ratio match up exactly.

When reading ratio, we read the colon or two dots as 'to'. Ratios are always given as integers or whole numbers except when you are asked to write them in the form 1:n or n:1. On these occasions, you may well end up with a decimal fraction.

## Ratio and Fractions

Comparing ratios and fractions, problem solving, writing ratio in form 1:n.

## Splitting totals into ratios

Splitting totals into ratios.

## Money and Ratio

Money problems involving ratio or ratio problems involving money epending on how you choose to look at it.

## Ratio Video

Totalling ratios to figure out how much orange paint is made from yellow and red paint.

Marking points on a scale or number line.

Marking points on a scale or number line.

Marking points on a scale or number line.

## PowerPoint on simplifying ratio

Writing ratios and simplifying ratios.

## GCSE questions on ratio

Lots of GCSE type questions on ratio.

## Write ratios in the form 1:n

There are examples of how to write ratios in the form 1:n and then lots of questions.

## Percentage, ratio and fractions comparisons

Problems that involve calculating a fraction of an amount, a percentage of an amount and the ratio of amounts to find the final answer.

## Conversion of fractions and ratios

Convert fractions into ratios and ratios into fractions.

## Simplifying ratios

Convert fractions into ratios and ratios into fractions. Simplifying algebraic ratios.

Marking points on a scale or number line. You might need a piece of string with this one.

Marking points on a scale or number line.

## Bar modelling Ratio

Gives bar models example to aid understanding of finding one part to solve the problem. More advanced questions for the more able combining two different ratios to determine an answer later on.

## Interactive Ratio Quiz

Interactive quiz on ratio and proportion type questions

## Ratio Revision

Ratio including number of parts, find the value of one part, find the values of various parts, convert ratio to fractions, Exchange rates

## Ratio Revision 2

Ratio including number of parts, find the value of one part, find the values of various parts, convert ratio to fractions, Exchange rates

## Ratio when there is a difference

Trying to determine the answer to a ratio question when you have a difference involved in the initial stages of the calculation.