Fractions are important because they tell you what portion of a whole you need.They are used in baking to tell how much of an ingredient to use. They are used in telling time,each minute is a fraction of an hour.
We use decimals in every day life while dealing with money,weight,length etc. They are used in situations where more precision is required. For eg, when we are weighting the weight of a rice bag it is not necessary that we can get the weight in whole numbers.
Percentages are widely used in many areas like discounts in shops, bank interest rates, and also to calculate our result in final exams
