1 <p>It is a simple question on decimal conversion. Firstly, we have to learn fractions and decimals. A mixed number represents a whole number and a fraction together. The whole number is written before the fraction, here it is 4. The fraction part has a numerator (number on the top), here 7, which represents how many parts out of the whole, and a denominator (number below), here 9, which shows how many parts make the whole. A decimal is a way to represent a number that is not whole, using a decimal point (.) to separate the whole part from the fraction part. The numbers to the left of the decimal point represent the whole, and those to the right represent the fractional part.</p>