Add 12/90 and 40/30
1st number: 12/90, 2nd number: 1 10/30
12/90 + 40/30 is 22/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
12/90 = 12 × 1/90 × 1 = 12/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
40/30 = 40 × 3/30 × 3 = 120/90 - Add the two like fractions:
12/90 + 120/90 = 12 + 120/90 = 132/90 - 132/90 simplified gives 22/15
- So, 12/90 + 40/30 = 22/15
In mixed form: 17/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90+40/30 12/90+80/30 12/90+40/60 36/90+40/30 12/90+40/90 60/90+40/30 84/90+40/30