Add 72/14 and 98/21, Solve 5 2/14 + 4 14/21 as a fraction

Add 72/14 and 98/21

1^st number: 5 2/14, 2^nd number: 4 14/21

72/14 + 98/21 is 206/21.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 14 × 3 = 42,
72/14 = 72 × 3/14 × 3 = 216/42
Likewise, for the 2nd fraction, since 21 × 2 = 42,
98/21 = 98 × 2/21 × 2 = 196/42
Add the two like fractions:
216/42 + 196/42 = 216 + 196/42 = 412/42
412/42 simplified gives 206/21
So, 72/14 + 98/21 = 206/21
In mixed form: 917/21

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad