Add 9/10 and 70/21
1st number: 9/10, 2nd number: 3 7/21
9/10 + 70/21 is 127/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
9/10 = 9 × 21/10 × 21 = 189/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
70/21 = 70 × 10/21 × 10 = 700/210 - Add the two like fractions:
189/210 + 700/210 = 189 + 700/210 = 889/210 - 889/210 simplified gives 127/30
- So, 9/10 + 70/21 = 127/30
In mixed form: 47/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10+70/21 9/20+70/21 9/10+70/42 27/10+70/21 9/30+70/21 9/10+70/63 45/10+70/21 9/50+70/21 63/10+70/21 9/70+70/21