Let's round to the nearest whole number.
3/5 = 0.6 = 1
3/4 = 0.75 = 1
1 + 1 = 2
Now let's find the common denominator:
The least common denominator between 5 and 4 is 20, so change both fractions to denominators of 20:
12/20 + 15/20
Add the numerators and keep the denominator:
27/20
27/20 = 1.35 = 1.5
Therefore adding the two fractions using a common denominator and then rounding gives us a closer answer.
