Fractions are something that does not contain a whole number, Decimals means number less than one.
These are some fractions, 1/5, 2/8, 8/3, etc.
When using fractions usually you have to solve a problem by making it fair, sharing,same amount each, etc.
For example if there was 4 people and 3.00 dollars you will need to share it by cents, the right amount it - 0.75. which is 3/4s if you divide each dollar by 4.
The relationship between decimals and fractions are from decimal you can divide the numerator to the denominator.
The Denominator comes from how many pieces, slices, etc, and numerator means how many parts are taken from that object,thing,etc.
Fractions can be used a lot, usually when you share slices, etc.
LI: What are fractions and Decimals.
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