Add 70/9 and 20/63
1st number: 7 7/9, 2nd number: 20/63
70/9 + 20/63 is 170/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
70/9 = 70 × 7/9 × 7 = 490/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
20/63 = 20 × 1/63 × 1 = 20/63 - Add the two like fractions:
490/63 + 20/63 = 490 + 20/63 = 510/63 - 510/63 simplified gives 170/21
- So, 70/9 + 20/63 = 170/21
In mixed form: 82/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/9+40/63 70/18+20/63 70/9+60/63 70/27+20/63 70/45+20/63 70/63+20/63