Add 21/14 and 42/4
1st number: 1 7/14, 2nd number: 10 2/4
21/14 + 42/4 is 12/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 4 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 14 × 2 = 28,
21/14 = 21 × 2/14 × 2 = 42/28 - Likewise, for the 2nd fraction, since 4 × 7 = 28,
42/4 = 42 × 7/4 × 7 = 294/28 - Add the two like fractions:
42/28 + 294/28 = 42 + 294/28 = 336/28 - 336/28 simplified gives 12/1
- So, 21/14 + 42/4 = 12/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+42/4 21/14+84/4 21/28+42/4 21/14+42/8 63/14+42/4 21/42+42/4 21/14+42/12 21/70+42/4 21/14+42/20 21/98+42/4 21/14+42/28