Question

If the price of petrol, diesel and LPG is slashed as follows:

Fuel	Old prices/ litre (in Rs)	New price/ litre (in Rs)	% Decrease
Petrol / L	45.62	40.62	______
Diesel / L	32.86	30.86	______
LPG/14.2kg	304.70	279.70	______

Complete the above table.

Answer 1

Fuel	Old prices/ litre (in Rs)	New price/ litre (in Rs)	% Decrease
Petrol / L	45.62	40.62	10.96%
Diesel / L	32.86	30.86	6.09%
LPG/14.2kg	304.70	279.70	8.20%

For Petrol/L,

Old price = ₹ 45.62

New price = ₹ 40.62

Decrement in price = ₹ 45.62 – ₹ 40.62 = ₹ 5

∴ Decrease % = `5/45.62 xx 100`

= `50000/4562`

= 10.96%

For Diesel/L,

Old price = ₹ 32.86

New price = ₹ 30.86

Decrement in price = ₹ 32.86 – ₹ 30.86 = ₹ 2

∴ Decrease % = `2/32.86 xx 100`

= `200/32.86`

= 6.0869

= 6.09%

For LPG,

Old price = ₹ 304.70

New price = ₹ 279.70

Decrement in price = ₹ 304.70 – ₹ 279.70 = ₹ 25

∴ Decrease % = `25/304.70 xx 100`

= `2500/304.70`

= 8.20%