For this case we have that by definition, the Pythagorean theorem states that:

Where:
a, b: Are the legs
c: It is the hypotenuse
According to the figure we have to:

Substituting in the formula we have:

Answer:
Option D
3/22 is the answer in simplest form
X × 75% = £45
x = £45 / 75%
x = £45 / 0,75
x = £60