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**1. Homework Statement**

Been given a problem where a force (F) is applied on a circular area (m

^{2}). If the percentage uncertainty of the force is 8% and the percentage uncertainty of the radius is 3%, what is the percentage uncertainty of the obtained value pressure?

**2. Homework Equations**

I know that pressure equals force over area and to find the area it is πr

^{2}. Anyway to work the percentage out?

**3. The Attempt at a Solution**

I assume you don't just 'add' the percentage uncertainties in this case. So far see that 8% over π3%

^{2}would be the equation to work this out.