Add 90/30 and 12/15
1st number: 3 0/30, 2nd number: 12/15
90/30 + 12/15 is 19/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
90/30 = 90 × 1/30 × 1 = 90/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
12/15 = 12 × 2/15 × 2 = 24/30 - Add the two like fractions:
90/30 + 24/30 = 90 + 24/30 = 114/30 - 114/30 simplified gives 19/5
- So, 90/30 + 12/15 = 19/5
In mixed form: 34/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+24/15 90/60+12/15 90/30+12/30 90/30+36/15 90/30+12/45 90/30+60/15 90/30+12/75 90/30+84/15