Add 42/21 and 98/28
1st number: 2 0/21, 2nd number: 3 14/28
42/21 + 98/28 is 11/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
42/21 = 42 × 4/21 × 4 = 168/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
98/28 = 98 × 3/28 × 3 = 294/84 - Add the two like fractions:
168/84 + 294/84 = 168 + 294/84 = 462/84 - 462/84 simplified gives 11/2
- So, 42/21 + 98/28 = 11/2
In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+98/28 42/21+98/56 42/63+98/28 42/21+98/84