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

Add 98/21 and 4/5

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

98/21 + 4/5 is 82/15.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 21 × 5 = 105,
98/21 = 98 × 5/21 × 5 = 490/105
Likewise, for the 2nd fraction, since 5 × 21 = 105,
4/5 = 4 × 21/5 × 21 = 84/105
Add the two like fractions:
490/105 + 84/105 = 490 + 84/105 = 574/105
574/105 simplified gives 82/15
So, 98/21 + 4/5 = 82/15
In mixed form: 57/15

MathStep (Works offline)

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