Add 81/4 and 45/7
1st number: 20 1/4, 2nd number: 6 3/7
81/4 + 45/7 is 747/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
81/4 = 81 × 7/4 × 7 = 567/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
45/7 = 45 × 4/7 × 4 = 180/28 - Add the two like fractions:
567/28 + 180/28 = 567 + 180/28 = 747/28 - So, 81/4 + 45/7 = 747/28
In mixed form: 2619/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4+90/7 81/8+45/7 81/4+45/14 81/12+45/7 81/4+45/21 81/20+45/7 81/4+45/35 81/28+45/7 81/4+45/49