Add 10/12 and 72/90
10/12 + 72/90 is 49/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
10/12 = 10 × 15/12 × 15 = 150/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
72/90 = 72 × 2/90 × 2 = 144/180 - Add the two like fractions:
150/180 + 144/180 = 150 + 144/180 = 294/180 - 294/180 simplified gives 49/30
- So, 10/12 + 72/90 = 49/30
In mixed form: 119/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/12+72/90 10/24+72/90 30/12+72/90 10/36+72/90 50/12+72/90 10/60+72/90 70/12+72/90 10/84+72/90