Add 90/9 and 70/20
1st number: 10 0/9, 2nd number: 3 10/20
90/9 + 70/20 is 27/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
90/9 = 90 × 20/9 × 20 = 1800/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
70/20 = 70 × 9/20 × 9 = 630/180 - Add the two like fractions:
1800/180 + 630/180 = 1800 + 630/180 = 2430/180 - 2430/180 simplified gives 27/2
- So, 90/9 + 70/20 = 27/2
In mixed form: 131/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18+70/20 90/9+70/40 90/27+70/20 90/9+70/60 90/45+70/20 90/63+70/20