Add 24/21 and 45/42
1st number: 1 3/21, 2nd number: 1 3/42
24/21 + 45/42 is 31/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
24/21 = 24 × 2/21 × 2 = 48/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
45/42 = 45 × 1/42 × 1 = 45/42 - Add the two like fractions:
48/42 + 45/42 = 48 + 45/42 = 93/42 - 93/42 simplified gives 31/14
- So, 24/21 + 45/42 = 31/14
In mixed form: 23/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21+45/42 24/21+90/42 24/42+45/42 24/21+45/84 72/21+45/42 24/63+45/42