Add 28/42 and 1/7
28/42 + 1/7 is 17/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
28/42 = 28 × 1/42 × 1 = 28/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
1/7 = 1 × 6/7 × 6 = 6/42 - Add the two like fractions:
28/42 + 6/42 = 28 + 6/42 = 34/42 - 34/42 simplified gives 17/21
- So, 28/42 + 1/7 = 17/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42+1/7 28/42+2/7 28/84+1/7 28/42+1/14 84/42+1/7 28/42+3/7 28/42+1/21 28/42+5/7 28/42+1/35 28/42+1/49