Luke bought a washing machine and a portable air-conditioner. The original price of the washing machine was $2400 and the original price of the portable air-conditioner was half the original price of the washing machine. Luke was given a 18% discount on the portable air-conditioner. How much did Luke pay altogether?
Original price of the portable air-conditioner
= 2400 ÷ 2
= $1200

Discounted price of the portable air-conditioner in percent
= 100% - 18%
= 82%

100% of the price of the portable air-conditioner = 1200
1% of the price of the portable air-conditioner = 1200 ÷ 100 = 12
82% of the price of the portable air-conditioner = 82 x 12 = 984

Discounted price of the portable air-conditioner = $984

Total amount that Luke paid
= 2400 + 984
= $3384

Answer(s): $3384