Add 90/7 and 6/20
1st number: 12 6/7, 2nd number: 6/20
90/7 + 6/20 is 921/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
90/7 = 90 × 20/7 × 20 = 1800/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
6/20 = 6 × 7/20 × 7 = 42/140 - Add the two like fractions:
1800/140 + 42/140 = 1800 + 42/140 = 1842/140 - 1842/140 simplified gives 921/70
- So, 90/7 + 6/20 = 921/70
In mixed form: 1311/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7+12/20 90/14+6/20 90/7+6/40 90/7+18/20 90/21+6/20 90/7+6/60 90/7+30/20 90/35+6/20 90/7+42/20 90/49+6/20