Add 70/8 and 8/21
1st number: 8 6/8, 2nd number: 8/21
70/8 + 8/21 is 767/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
70/8 = 70 × 21/8 × 21 = 1470/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
8/21 = 8 × 8/21 × 8 = 64/168 - Add the two like fractions:
1470/168 + 64/168 = 1470 + 64/168 = 1534/168 - 1534/168 simplified gives 767/84
- So, 70/8 + 8/21 = 767/84
In mixed form: 911/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/8+16/21 70/16+8/21 70/8+8/42 70/8+24/21 70/24+8/21 70/8+8/63 70/8+40/21 70/40+8/21 70/8+56/21 70/56+8/21