Add 7/4 and 81/42
1st number: 1 3/4, 2nd number: 1 39/42
7/4 + 81/42 is 103/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
7/4 = 7 × 21/4 × 21 = 147/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
81/42 = 81 × 2/42 × 2 = 162/84 - Add the two like fractions:
147/84 + 162/84 = 147 + 162/84 = 309/84 - 309/84 simplified gives 103/28
- So, 7/4 + 81/42 = 103/28
In mixed form: 319/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/4+81/42 7/8+81/42 7/4+81/84 21/4+81/42 7/12+81/42 35/4+81/42 7/20+81/42 49/4+81/42 7/28+81/42