Add 8/10 and 72/21
1st number: 8/10, 2nd number: 3 9/21
8/10 + 72/21 is 148/35.
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,
8/10 = 8 × 21/10 × 21 = 168/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
72/21 = 72 × 10/21 × 10 = 720/210 - Add the two like fractions:
168/210 + 720/210 = 168 + 720/210 = 888/210 - 888/210 simplified gives 148/35
- So, 8/10 + 72/21 = 148/35
In mixed form: 48/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10+72/21 8/20+72/21 8/10+72/42 24/10+72/21 8/30+72/21 8/10+72/63 40/10+72/21 8/50+72/21 56/10+72/21 8/70+72/21