The pre-paid recharge of Airtel gives 21% less talktime than the same price pre-paid recharge of Vodafone. The post-paid talktime of Airtel is 12% more than its pre-paid recharge, having the same price. Further, the post-paid talktime of same price of Vodafone is 15% less than its pre-paid recharge. How much percent less / more talktime can one get from the Airtel post-paid service compared to the post-paid service of Vodafone?
Explanation:
Assume that for price P, assume that Vodafone gives talk time of 100 seconds.
So, for the same price P, Airtel gives talk time of 79 (= 21% less than 100) seconds.
The post-paid talk time for the same price by Airtel and Vodafone is 1.12 × 79 and 100 × 0.85, i.e., 88.48 seconds and 85 seconds respectively.
One can get 88.48 – 85 = 3.48 seconds more from Airtel post-paid service compared to the Vodafone post-paid service.
Required percentage = 3.48/85 = 4.07
The closest option is option 1.
Hence, option (a).
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