P, Q, R and S have ₹120, ₹130, ₹140 and ₹150 respectively when they go to visit a fair. P spends ₹49, Q spends ₹54, R spends ₹55 and S spends ₹58. Who has done the lowest expenditure proportionate to their resources?

To find who has the lowest expenditure proportionate to their resources, we need to calculate what percentage each person spent of their total money.

Expenditure Percentage = (Amount Spent ÷ Amount They Had) × 100

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For P:

Had: ₹120, Spent: ₹49

Percentage = $(49 \div 120) \times 100$

Percentage = $40.83\%$

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For Q:

Had: ₹130, Spent: ₹54

Percentage = $(54 \div 130) \times 100$

Percentage = $41.54\%$

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For R:

Had: ₹140, Spent: ₹55

Percentage = $(55 \div 140) \times 100$

Percentage = $39.29\%$

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For S:

Had: ₹150, Spent: ₹58

Percentage = $(58 \div 150) \times 100$

Percentage = $38.67\%$

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Comparing all percentages:

P: $40.83\%$

Q: $41.54\%$

R: $39.29\%$

S: $38.67\%$

S has the lowest expenditure percentage at $38.67\%$.

Therefore, S has done the lowest expenditure proportionate to their resources.