Add 70/8 and 5/21
1st number: 8 6/8, 2nd number: 5/21
70/8 + 5/21 is 755/84.
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,
5/21 = 5 × 8/21 × 8 = 40/168 - Add the two like fractions:
1470/168 + 40/168 = 1470 + 40/168 = 1510/168 - 1510/168 simplified gives 755/84
- So, 70/8 + 5/21 = 755/84
In mixed form: 883/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/8+10/21 70/16+5/21 70/8+5/42 70/8+15/21 70/24+5/21 70/8+5/63 70/8+25/21 70/40+5/21 70/8+35/21 70/56+5/21