Add 21/64 and 70/9
1st number: 21/64, 2nd number: 7 7/9
21/64 + 70/9 is 4669/576.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 9 is 576
Next, find the equivalent fraction of both fractional numbers with denominator 576 - For the 1st fraction, since 64 × 9 = 576,
21/64 = 21 × 9/64 × 9 = 189/576 - Likewise, for the 2nd fraction, since 9 × 64 = 576,
70/9 = 70 × 64/9 × 64 = 4480/576 - Add the two like fractions:
189/576 + 4480/576 = 189 + 4480/576 = 4669/576 - So, 21/64 + 70/9 = 4669/576
In mixed form: 861/576
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/64+70/9 21/64+70/18 63/64+70/9 21/64+70/27 21/64+70/45 21/64+70/63