Add 21/2 and 1/42
1st number: 10 1/2, 2nd number: 1/42
21/2 + 1/42 is 221/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
21/2 = 21 × 21/2 × 21 = 441/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
1/42 = 1 × 1/42 × 1 = 1/42 - Add the two like fractions:
441/42 + 1/42 = 441 + 1/42 = 442/42 - 442/42 simplified gives 221/21
- So, 21/2 + 1/42 = 221/21
In mixed form: 1011/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+1/42 21/2+2/42 21/4+1/42 21/2+1/84 63/2+1/42 21/2+3/42 21/6+1/42 21/2+5/42 21/10+1/42 21/2+7/42 21/14+1/42