Add 21/2 and 72/70
1st number: 10 1/2, 2nd number: 1 2/70
21/2 + 72/70 is 807/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 2 × 35 = 70,
21/2 = 21 × 35/2 × 35 = 735/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
72/70 = 72 × 1/70 × 1 = 72/70 - Add the two like fractions:
735/70 + 72/70 = 735 + 72/70 = 807/70 - So, 21/2 + 72/70 = 807/70
In mixed form: 1137/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+72/70 21/4+72/70 63/2+72/70 21/6+72/70 21/10+72/70 21/14+72/70