Add 35/21 and 90/12
1st number: 1 14/21, 2nd number: 7 6/12
35/21 + 90/12 is 55/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
35/21 = 35 × 4/21 × 4 = 140/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
90/12 = 90 × 7/12 × 7 = 630/84 - Add the two like fractions:
140/84 + 630/84 = 140 + 630/84 = 770/84 - 770/84 simplified gives 55/6
- So, 35/21 + 90/12 = 55/6
In mixed form: 91/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+90/12 35/42+90/12 35/21+90/24 35/63+90/12 35/21+90/36 35/21+90/60 35/21+90/84