The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.
LCD(7/20, 3/8) = 40
Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.
(720×22)+(38×55)=?
Complete the multiplication and the equation becomes
1440+1540=?
The two fractions now have like denominators so you can add the numerators.
Answers & Comments
Answer:
29/40
Step-by-step explanation:
The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.
LCD(7/20, 3/8) = 40
Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.
(720×22)+(38×55)=?
Complete the multiplication and the equation becomes
1440+1540=?
The two fractions now have like denominators so you can add the numerators.
Then:
14+1540=2940
This fraction cannot be reduced.
Therefore:
720+38=2940