Question

Write a real world problem with a percent that can be solved by using the proportion 3/b=60/100

Answer 1

Kyle received 60/100 on his algebra test.  If he scored 3 points, how many points was the test out of? Answer is 5.

Answer 2

A tree of 60 feet casts the shadow of 100 feet, at the same time, what is the length of the shadow of a boy who is 3 feet tall ?

Solution :

Let b represents the length ( in ft ) of the shadow of the boy,

∵ Height of the boy = 3 ft,

So, the ratio of the height of boy and his shadow =
`(3)/(b)`

Now, the tree of 60 ft long casts 100 ft shadow,

So, the ratio of height of tree and its shadow =
`(60)/(100)`

At the same time,

`(3)/(b)=(60)/(100)`

Which is the required equation.