Add 20/6 and 90/7
1st number: 3 2/6, 2nd number: 12 6/7
20/6 + 90/7 is 340/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
20/6 = 20 × 7/6 × 7 = 140/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
90/7 = 90 × 6/7 × 6 = 540/42 - Add the two like fractions:
140/42 + 540/42 = 140 + 540/42 = 680/42 - 680/42 simplified gives 340/21
- So, 20/6 + 90/7 = 340/21
In mixed form: 164/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/6+90/7 20/12+90/7 20/6+90/14 60/6+90/7 20/18+90/7 20/6+90/21 20/30+90/7 20/6+90/35 20/42+90/7 20/6+90/49