The ratio is the relationship of two numbers. For example you
have 2 flashlights and 5 batteries. To compare the ratio between
the flashlights and the batteries we divide the set of flashlights
with the set of batteries.
The ratio is 2 to 5 or 2:5 or 2/5. All these describe the ratio
in different forms of fractions. The ratio can consequently be
expressed as fractions or as a decimal. 2:5 in decimals is 0.4.
A rate is a little bit different than the ratio, it is a special
ratio. It is a comparison of measurements that have different
units, like cents and grams. A unit rate is a rate
with a denominator of 1.
Sarah is buying jellybeans for her best friend's birthday party.
She buys a bag of 10 lb of jellybeans that costs $45. Sarah is
wondering how much 1 lb of jellybeans cost.
Video lesson: Express the ratio as a fraction
in simplest form and as a decimal