Question

The price of a train ticket from Lexington to Oklahoma City is normally $138.00. However, children under the age of 16 receive a 65% discount. How do you find the sale price for someone under the age of 16?

Answer 1

$ 48.30

Explanation:

We have to calculate 65% of $138 and then subtract this from the full fare.

65% of $138 = `65/100xx138 = 0.65xx138 = 89.70`

discounted price =$ 138 - $89.70 = $48.30

Answer 2

`$48.30`

Explanation:

`color(blue)("Using first principles")`

Original price - discount price

`$138.00-65%" of "$138`

`$138-(65/100xx$138)`

`$138-$89.70 =$48.30`

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
`color(blue)("Using shortcut")`

`$138.00(1-65/100) ->$138xx 35/100 = $48.30`