In the evening, Ted went to a stationery shop and asked for a pen. The shopkeeper gave the pen and he took out ₹ 10 as he remembered paying the same amount the last time.

Shopkeeper: Hey, there’s 20% increase on the price of this pen.

How much should Ted pay now?

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Solution

The correct option is C
12

There is an increase on the old price of the pen.

Old price = ₹ 10

New price = Old price + $20 %$ of Old price

= ₹ 10 + $\frac{20}{100} \times$ 10

= ₹ (10 + 2)

= ₹ 12

OR

To get the final amount directly,

$New price = Old price \times \frac{100 + increase %}{100}$

= $₹ 10 \times \frac{120}{100}$

= ₹ 12

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In the evening, Ted went to a stationery shop and asked for a pen. The shopkeeper gave the pen and he took out ₹ 10 as he remembered paying the same amount the last time. Shopkeeper: Hey, there’s 20% increase on the price of this pen. How much should Ted pay now?

The correct option is C 12 There is an increase on the old price of the pen. Old price = ₹ 10 New price = Old price + 20% of Old price = ₹ 10 + 20100× 10 = ₹ (10 + 2) = ₹ 12 OR To get the final amount directly, New price = Old price × 100 + increase%100 = ₹ 10 × 120100 = ₹ 12

In the evening, Ted went to a stationery shop and asked for a pen. The shopkeeper gave the pen and he took out ₹ 10 as he remembered paying the same amount the last time.

Shopkeeper: Hey, there’s 20% increase on the price of this pen.

How much should Ted pay now?