Any whole number can be expressed as a fraction by writing it over one.
The whole number, one hundred, becomes the numerator above a denominator of one.
The whole number, thirty, becomes the numerator above a denominator of one.
We can express a fraction as a percentage by multiplying it by one hundred over one.
If the fraction is three-fifths (three over five), we multiply it by one hundred over one to obtain its equivalent as a percentage.
Multiplying the numerators (in this case, three and one hundred) gives a numerator of three hundred.
Doing the same to the denominators (five and one) leaves us with a denominator of five.
As the short line or vinculum between a numerator and a denominator can act as the sign, division, we obtain three-fifths as a percentage by dividing our new numerator (three hundred) by the denominator (five).
Therefore, the fraction, three-fifths, expressed as a percentage, is sixty per cent (60%).
In order to express a fraction as a decimal, divide the denominator into the numerator.
In the case of, let’s say, three-quarters, we divide the denominator, four, into the numerator, three.
Three-quarters, as a decimal, is, therefore, nought point seven five (0.75).