Add 25/21 and 98/35, Solve 1 4/21 + 2 28/35 as a fraction

Add 25/21 and 98/35

1^st number: 1 4/21, 2^nd number: 2 28/35

25/21 + 98/35 is 419/105.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 21 × 5 = 105,
25/21 = 25 × 5/21 × 5 = 125/105
Likewise, for the 2nd fraction, since 35 × 3 = 105,
98/35 = 98 × 3/35 × 3 = 294/105
Add the two like fractions:
125/105 + 294/105 = 125 + 294/105 = 419/105
So, 25/21 + 98/35 = 419/105
In mixed form: 3104/105

MathStep (Works offline)

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