Add 70/20 and 90/9
1st number: 3 10/20, 2nd number: 10 0/9
70/20 + 90/9 is 27/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
70/20 = 70 × 9/20 × 9 = 630/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
90/9 = 90 × 20/9 × 20 = 1800/180 - Add the two like fractions:
630/180 + 1800/180 = 630 + 1800/180 = 2430/180 - 2430/180 simplified gives 27/2
- So, 70/20 + 90/9 = 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: 70/40+90/9 70/20+90/18 70/60+90/9 70/20+90/27 70/20+90/45 70/20+90/63