Add 70/20 and 40/9
1st number: 3 10/20, 2nd number: 4 4/9
70/20 + 40/9 is 143/18.
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,
40/9 = 40 × 20/9 × 20 = 800/180 - Add the two like fractions:
630/180 + 800/180 = 630 + 800/180 = 1430/180 - 1430/180 simplified gives 143/18
- So, 70/20 + 40/9 = 143/18
In mixed form: 717/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20+80/9 70/40+40/9 70/20+40/18 70/60+40/9 70/20+40/27 70/20+40/45 70/20+40/63