Add 21/28 and 1/8
21/28 + 1/8 is 7/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
21/28 = 21 × 2/28 × 2 = 42/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
1/8 = 1 × 7/8 × 7 = 7/56 - Add the two like fractions:
42/56 + 7/56 = 42 + 7/56 = 49/56 - 49/56 simplified gives 7/8
- So, 21/28 + 1/8 = 7/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+1/8 21/28+2/8 21/56+1/8 21/28+1/16 63/28+1/8 21/28+3/8 21/84+1/8 21/28+1/24 21/28+5/8 21/28+1/40 21/28+7/8 21/28+1/56