Add 18/90 and 70/12
1st number: 18/90, 2nd number: 5 10/12
18/90 + 70/12 is 181/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
18/90 = 18 × 2/90 × 2 = 36/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
70/12 = 70 × 15/12 × 15 = 1050/180 - Add the two like fractions:
36/180 + 1050/180 = 36 + 1050/180 = 1086/180 - 1086/180 simplified gives 181/30
- So, 18/90 + 70/12 = 181/30
In mixed form: 61/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/90+70/12 18/90+70/24 54/90+70/12 18/90+70/36 18/90+70/60 18/90+70/84