Add 20/63 and 70/9
1st number: 20/63, 2nd number: 7 7/9
20/63 + 70/9 is 170/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
20/63 = 20 × 1/63 × 1 = 20/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
70/9 = 70 × 7/9 × 7 = 490/63 - Add the two like fractions:
20/63 + 490/63 = 20 + 490/63 = 510/63 - 510/63 simplified gives 170/21
- So, 20/63 + 70/9 = 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: 40/63+70/9 20/63+70/18 60/63+70/9 20/63+70/27 20/63+70/45 20/63+70/63