Add 3/21 and 90/56
1st number: 3/21, 2nd number: 1 34/56
3/21 + 90/56 is 7/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
3/21 = 3 × 8/21 × 8 = 24/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
90/56 = 90 × 3/56 × 3 = 270/168 - Add the two like fractions:
24/168 + 270/168 = 24 + 270/168 = 294/168 - 294/168 simplified gives 7/4
- So, 3/21 + 90/56 = 7/4
In mixed form: 13/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+90/56 3/42+90/56 9/21+90/56 3/63+90/56 15/21+90/56