Add 21/2 and 75/70
1st number: 10 1/2, 2nd number: 1 5/70
21/2 + 75/70 is 81/7.
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,
75/70 = 75 × 1/70 × 1 = 75/70 - Add the two like fractions:
735/70 + 75/70 = 735 + 75/70 = 810/70 - 810/70 simplified gives 81/7
- So, 21/2 + 75/70 = 81/7
In mixed form: 114/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+75/70 21/4+75/70 63/2+75/70 21/6+75/70 21/10+75/70 21/14+75/70