Add 90/12 and 7/20
1st number: 7 6/12, 2nd number: 7/20
90/12 + 7/20 is 157/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
90/12 = 90 × 5/12 × 5 = 450/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
7/20 = 7 × 3/20 × 3 = 21/60 - Add the two like fractions:
450/60 + 21/60 = 450 + 21/60 = 471/60 - 471/60 simplified gives 157/20
- So, 90/12 + 7/20 = 157/20
In mixed form: 717/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+14/20 90/24+7/20 90/12+7/40 90/12+21/20 90/36+7/20 90/12+7/60 90/12+35/20 90/60+7/20 90/12+49/20 90/84+7/20