All -
It has been a while since I ever used Math. This is a very simple problem. How do I calculate the percentage of the following
Suppose I have 30 apples, and out of 30 Apples, 10 apples have become rotten, what is the percentage of apples that have become rotten?
Thanks.
Simply divide $10$ by $30$ and multiply by $100$ to get the percentage.
$$\frac{10\;\text{rotten apples}}{30\;\text{apples in all}} \times 100\% = \text{percentage of rotten apples}$$
That gives you that $\;\dfrac 13 \times 100\% = 33.\overline{33}\%\;$ of the apples are rotten.