Cant understand this last example.
Hi!
Here is the answer to your query.
Expenditure on clothes = 10%
Expenditure on education = 15%
Savings = 20%
Expenditure on house rent = 20%
Expenditure on food = 15%
Expenditure on others = 20%
We know that, 10 < 15 < 20 ⇒ 10% < 15% < 20%
∴Expenditure is least on clothes.
Monthly savings of Mr. Nair = Rs 4000
The circle graph shows that, 20% represents Rs 4000.
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Thus, the monthly expenditure on food is Rs 3000.
Cheers!