Julian and Jenson went to buy mobile phones at a sale. The usual price of 1 mobile phone was $1900 each.

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

1. Julian bought 1 mobile phone. How much did he pay?
2. What is the maximum number of mobile phones Jenson 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 = 1900
1% of 1 mobile phone = 1900 ÷ 100 = 19
85% of 1 mobile phone = 85 x 19 = 1615 

Amount that Julian paid for 1 mobile phone = $1615

(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 19 = 1425

Amount that Jenson paid for 1 mobile phone = $1425

Maximum number of mobile phones that Jenson can buy if he has $2000
= 2000 ÷ 1425
= 1 r 575

Answer(s): (a) $1615; (b) 1