Add 90/12 and 90/30
1st number: 7 6/12, 2nd number: 3 0/30
90/12 + 90/30 is 21/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 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 30 × 2 = 60,
90/30 = 90 × 2/30 × 2 = 180/60 - Add the two like fractions:
450/60 + 180/60 = 450 + 180/60 = 630/60 - 630/60 simplified gives 21/2
- So, 90/12 + 90/30 = 21/2
In mixed form: 101/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/24+90/30 90/12+90/60 90/36+90/30 90/60+90/30 90/84+90/30