Add 21/2 and 10/42
1st number: 10 1/2, 2nd number: 10/42
21/2 + 10/42 is 451/42.
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,
10/42 = 10 × 1/42 × 1 = 10/42 - Add the two like fractions:
441/42 + 10/42 = 441 + 10/42 = 451/42 - So, 21/2 + 10/42 = 451/42
In mixed form: 1031/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+10/42 21/2+20/42 21/4+10/42 21/2+10/84 63/2+10/42 21/2+30/42 21/6+10/42 21/2+50/42 21/10+10/42 21/2+70/42 21/14+10/42