Add 90/20 and 7/15
1st number: 4 10/20, 2nd number: 7/15
90/20 + 7/15 is 149/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
90/20 = 90 × 3/20 × 3 = 270/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
7/15 = 7 × 4/15 × 4 = 28/60 - Add the two like fractions:
270/60 + 28/60 = 270 + 28/60 = 298/60 - 298/60 simplified gives 149/30
- So, 90/20 + 7/15 = 149/30
In mixed form: 429/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+14/15 90/40+7/15 90/20+7/30 90/20+21/15 90/60+7/15 90/20+7/45 90/20+35/15 90/20+7/75 90/20+49/15