Add 90/12 and 70/45
1st number: 7 6/12, 2nd number: 1 25/45
90/12 + 70/45 is 163/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
90/12 = 90 × 15/12 × 15 = 1350/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
70/45 = 70 × 4/45 × 4 = 280/180 - Add the two like fractions:
1350/180 + 280/180 = 1350 + 280/180 = 1630/180 - 1630/180 simplified gives 163/18
- So, 90/12 + 70/45 = 163/18
In mixed form: 91/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/24+70/45 90/12+70/90 90/36+70/45 90/60+70/45 90/84+70/45