Add 12/30 and 3/90
12/30 + 3/90 is 13/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
12/30 = 12 × 3/30 × 3 = 36/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
3/90 = 3 × 1/90 × 1 = 3/90 - Add the two like fractions:
36/90 + 3/90 = 36 + 3/90 = 39/90 - 39/90 simplified gives 13/30
- So, 12/30 + 3/90 = 13/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/30+3/90 12/30+6/90 12/60+3/90 36/30+3/90 12/30+9/90 12/90+3/90 60/30+3/90 12/30+15/90 84/30+3/90 12/30+21/90