A decimal is a number writtten in decimal notation.
When numbers are written in decimal notation, they are written with a decimal point.
e.g. 132.74 is a decimal (number)
But 132 is an integer - it is a whole number
However 132. ( a decimal point after the number but no zeros) is also a decimal number
For clarity, 132. should be written as 132.0
When you have one number (integer) over another number (integer) then that is a fraction
e.g. 132 / 217 is a fraction, since the numerator is smaller than the denominator,
and 217 / 132 is an improper fraction, because the numerator is greater than the denominator.
A compound fraction, or mixed number, is made up of an integer and a (proper) fraction,
e.g. 27 11/13