To solve this problem you must apply the proccedure shown below:
1. You have that
varies inversely with
and when
the value of
is
.
2. Therefore, you can write the following expression, where
is the constant of proportionality:

3. Solve for the constant of proportionality and substitute the values to calculate it:

4. The equation is:

The answer is: 
The 54 percentage of 40 inches is 21.6 inches
7/28 6/24 8/32 those are the fractions I hope this helps
I’ll be happy to help! Just message me exactly what to do, we can go on a voice call aswell and you can write it, and ai’ll tty to help, its ok if not tho