Add 21/2 and 20/70
1st number: 10 1/2, 2nd number: 20/70
21/2 + 20/70 is 151/14.
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,
20/70 = 20 × 1/70 × 1 = 20/70 - Add the two like fractions:
735/70 + 20/70 = 735 + 20/70 = 755/70 - 755/70 simplified gives 151/14
- So, 21/2 + 20/70 = 151/14
In mixed form: 1011/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+20/70 21/2+40/70 21/4+20/70 63/2+20/70 21/2+60/70 21/6+20/70 21/10+20/70 21/14+20/70