Add 98/28 and 12/70, Solve 3 14/28 + 12/70 as a fraction

Add 98/28 and 12/70

1^st number: 3 14/28, 2^nd number: 12/70

98/28 + 12/70 is 257/70.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 28 × 5 = 140,
98/28 = 98 × 5/28 × 5 = 490/140
Likewise, for the 2nd fraction, since 70 × 2 = 140,
12/70 = 12 × 2/70 × 2 = 24/140
Add the two like fractions:
490/140 + 24/140 = 490 + 24/140 = 514/140
514/140 simplified gives 257/70
So, 98/28 + 12/70 = 257/70
In mixed form: 347/70

MathStep (Works offline)

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