Question

Sue's tyre pressure gauge shows a reading which is 8% higher than the actual pressure.

What is the actual pressure when sue's gauge shows 39.42?

Answer 1

36.5 is the answer

Hope this helps!

Explanation:

Let the actual pressure be x

The actual pressure is 100% of x

The pressure is showing 8% more

So the pressure showing now is the actual pressure + the extra pressure

= 100%+8% = 108%

= 108/100

So the equation is:

108/100 x = 39.42

108x = 39.42*100

108x = 3942

x= 3942/108

= 36.5

Therefore the actual pressure is 36.5