Question

Keeley buys songs from a music website. She buys 35 songs for $26.25. What is the price per song?

Answer 1

This is why Jacob's shortcut method works.

The cost of 1 song is 75 cents

Explanation:

Using ratio in fraction form:

`("cost")/("Songs bought") ->($26.25)/35`

But the target is `("cost")/("1 song")` so we need to change the 35 into 1.

For multiply and divide; what you do to the bottom you also do to the top.

`("cost")/("Songs bought") ->($26.25)/35 -=("cost")/1`

`("cost")/("Songs bought") ->(color(red)($26.25-:35))/(35-:35) -=($0.75)/1=("cost")/("1 song")`

The cost of 1 song is 75 cents

The bit in red is the shortcut method.