### Теория:

In the previous chapter, we studied about basics of percentage, and it's conversion methods. Now We will take a look at the practical problems of percentage.
• The term "percent" means per hundred or for every hundred. This term has been derived from the Latin word per centum.
• The symbol ($$\%$$) is used for the term percent.
Example:
13 percent is written as 13$$\%,$$ and it means that "13 out of $$100$$".
Fractional Equivalents of Commonly used Percentages:
 $$1$$$$\%$$ $$=$$ $$1/100$$ $$2$$$$\%$$ $$=$$ $$1/50$$ $$4$$ $$\%$$ $$=$$ $$1/25$$ $$5$$$$\%$$ $$=$$ $$1/20$$ $$8$$$$\%$$ $$=$$ $$2/25$$ $$10$$$$\%$$ $$=$$ $$1/10$$ $$12$$$$\%$$ $$=$$ $$3/25$$ $$15$$$$\%$$ $$=$$ $$3/25$$ $$16$$$$\%$$ $$=$$ $$4/25$$ $$20$$$$\%$$ $$=$$ $$1/4$$ $$25$$$$\%$$ $$=$$ $$1/4$$ $$40$$$$\%$$ $$=$$ $$2/5$$ $$50$$$$\%$$ $$=$$ $$1/2$$ $$60$$$$\%$$ $$=$$ $$3/5$$ $$75$$$$\%$$ $$=$$ $$3/4$$ $$80$$$$\%$$ $$=$$ $$4/5$$