Jenson and Vaidev went to buy mobile phones at a sale. The usual price of 1 mobile phone was $1500 each.

SALE
Buy 1 mobile phone at 15% discount
Buy 2 or more mobile phones at 25% discount each

1. Jenson bought 1 mobile phone. How much did he pay?
2. What is the maximum number of mobile phones Vaidev can buy if he has $2000?

(a)
Discounted price of 1 mobile phone in percent if only 1 was bought
= 100% - 15%
= 85%

100% of 1 mobile phone = 1500
1% of 1 mobile phone = 1500 ÷ 100 = 15
85% of 1 mobile phone = 85 x 15 = 1275 

Amount that Jenson paid for 1 mobile phone = $1275

(b)
Discounted price of 1 mobile phone in percent if more than 1 was bought
= 100% - 25%
= 75%

75% of 1 mobile phone = 75 x 15 = 1125

Amount that Vaidev paid for 1 mobile phone = $1125

Maximum number of mobile phones that Vaidev can buy if he has $2000
= 2000 ÷ 1125
= 1 r 875

Answer(s): (a) $1275; (b) 1