1.Daddy wrote:Hi,

I have 2 qn to ask. Thanks

1. A digital camera was selling at $480. After giving 20% discount, Kenny made an extra 20%. Find the cost price of the camera.

2. Junyang's saving and Weiming's saving are in the ratio of 3:8. If Weiming's saving is decreasing by 25%, their total saving will be $300. How much is Junyang's saving at first?

Thankss

Selling price of camera = 8/10 x 480 = 384 (20% discount)

cost price = 10/12 x 384 = $320 (20% profit)

2.

Let Junyang's savings = 3u

Weiming's savings = 8u

After decreasing by 25%, Weiming's savings = 75/100 *8u = 6u

3u+6u = 9u = 300

Junyang's saving at first = 3u = 3 * 300/9 = $100

HTH