Add 50/15 and 98/21, Solve 3 5/15 + 4 14/21 as a fraction

Add 50/15 and 98/21

1^st number: 3 5/15, 2^nd number: 4 14/21

50/15 + 98/21 is 8/1.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 15 × 7 = 105,
50/15 = 50 × 7/15 × 7 = 350/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
98/21 = 98 × 5/21 × 5 = 490/105
Add the two like fractions:
350/105 + 490/105 = 350 + 490/105 = 840/105
840/105 simplified gives 8/1
So, 50/15 + 98/21 = 8/1

MathStep (Works offline)

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