Add 10/21 and 10/8
1st number: 10/21, 2nd number: 1 2/8
10/21 + 10/8 is 145/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
10/21 = 10 × 8/21 × 8 = 80/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
10/8 = 10 × 21/8 × 21 = 210/168 - Add the two like fractions:
80/168 + 210/168 = 80 + 210/168 = 290/168 - 290/168 simplified gives 145/84
- So, 10/21 + 10/8 = 145/84
In mixed form: 161/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21+10/8 10/21+20/8 10/42+10/8 10/21+10/16 30/21+10/8 10/21+30/8 10/63+10/8 10/21+10/24 50/21+10/8 10/21+50/8 10/21+10/40 70/21+10/8 10/21+70/8 10/21+10/56