Add 21/7 and 75/18
1st number: 3 0/7, 2nd number: 4 3/18
21/7 + 75/18 is 43/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
21/7 = 21 × 18/7 × 18 = 378/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
75/18 = 75 × 7/18 × 7 = 525/126 - Add the two like fractions:
378/126 + 525/126 = 378 + 525/126 = 903/126 - 903/126 simplified gives 43/6
- So, 21/7 + 75/18 = 43/6
In mixed form: 71/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+75/18 21/14+75/18 21/7+75/36 63/7+75/18 21/7+75/54 21/35+75/18 21/7+75/90 21/49+75/18