Add 42/98 and 21/8
1st number: 42/98, 2nd number: 2 5/8
42/98 + 21/8 is 171/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 8 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 98 × 4 = 392,
42/98 = 42 × 4/98 × 4 = 168/392 - Likewise, for the 2nd fraction, since 8 × 49 = 392,
21/8 = 21 × 49/8 × 49 = 1029/392 - Add the two like fractions:
168/392 + 1029/392 = 168 + 1029/392 = 1197/392 - 1197/392 simplified gives 171/56
- So, 42/98 + 21/8 = 171/56
In mixed form: 33/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/98+21/8 42/98+42/8 42/98+21/16 42/98+63/8 42/98+21/24 42/98+21/40 42/98+21/56