Add 21/4 and 70/28
1st number: 5 1/4, 2nd number: 2 14/28
21/4 + 70/28 is 31/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 28 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
21/4 = 21 × 7/4 × 7 = 147/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
70/28 = 70 × 1/28 × 1 = 70/28 - Add the two like fractions:
147/28 + 70/28 = 147 + 70/28 = 217/28 - 217/28 simplified gives 31/4
- So, 21/4 + 70/28 = 31/4
In mixed form: 73/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4+70/28 21/8+70/28 21/4+70/56 63/4+70/28 21/12+70/28 21/4+70/84 21/20+70/28 21/28+70/28