Add 1/3 and 72/42
1st number: 1/3, 2nd number: 1 30/42
1/3 + 72/42 is 43/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 3 × 14 = 42,
1/3 = 1 × 14/3 × 14 = 14/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
72/42 = 72 × 1/42 × 1 = 72/42 - Add the two like fractions:
14/42 + 72/42 = 14 + 72/42 = 86/42 - 86/42 simplified gives 43/21
- So, 1/3 + 72/42 = 43/21
In mixed form: 21/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/3+72/42 1/6+72/42 1/3+72/84 1/9+72/42 5/3+72/42 1/15+72/42 7/3+72/42 1/21+72/42