Add 21/28 and 70/7
1st number: 21/28, 2nd number: 10 0/7
21/28 + 70/7 is 43/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
21/28 = 21 × 1/28 × 1 = 21/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
70/7 = 70 × 4/7 × 4 = 280/28 - Add the two like fractions:
21/28 + 280/28 = 21 + 280/28 = 301/28 - 301/28 simplified gives 43/4
- So, 21/28 + 70/7 = 43/4
In mixed form: 103/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+70/7 21/56+70/7 21/28+70/14 63/28+70/7 21/84+70/7 21/28+70/21 21/28+70/35 21/28+70/49