To get rid of the decimal point in the numerator, we count the numbers after the decimal in 4.05, and multiply the numerator and denominator by 10 if it is 1 number, 100 if it is 2 numbers, 1000 if it is 3 numbers, and so on.
Therefore, in this case we multiply the numerator and denominator by 100 to get the following fraction
Explanation: You can convert the fractions to a decimal by dividing the numerator by the denominator. For example, for the fraction 401/99 you divide the numerator:401 by the denominator:99. 401 divided by 99 is 4.050505. Instead of writing the extra 05’s you can simply write 4.05 with a line over the 5 like there is in the 4.05 in the image question.