Add 42/28 and 21/7
1st number: 1 14/28, 2nd number: 3 0/7
42/28 + 21/7 is 9/2.
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,
42/28 = 42 × 1/28 × 1 = 42/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
21/7 = 21 × 4/7 × 4 = 84/28 - Add the two like fractions:
42/28 + 84/28 = 42 + 84/28 = 126/28 - 126/28 simplified gives 9/2
- So, 42/28 + 21/7 = 9/2
In mixed form: 41/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28+21/7 42/28+42/7 42/56+21/7 42/28+21/14 42/28+63/7 42/84+21/7 42/28+21/35 42/28+21/49