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:
\(1\)\(\%\) \(=\) \(1/100\)\(2\)\(\%\) \(=\) \(1/50\)\(4\) \(\%\) \(=\) \(1/25\)\(5\)\(\%\) \(=\) \(1/20\)
\(8\)\(\%\) \(=\) \(2/25\)\(10\)\(\%\) \(=\) \(1/10\)\(12\)\(\%\) \(=\) \(3/25\)\(15\)\(\%\) \(=\) \(3/25\)
\(16\)\(\%\) \(=\) \(4/25\)\(20\)\(\%\) \(=\) \(1/4\)\(25\)\(\%\) \(=\) \(1/4\)\(40\)\(\%\) \(=\) \(2/5\)
\(50\)\(\%\) \(=\) \(1/2\)\(60\)\(\%\) \(=\) \(3/5\)\(75\)\(\%\) \(=\) \(3/4\)\(80\)\(\%\) \(=\) \(4/5\)