Add 75/54 and 15/21
1st number: 1 21/54, 2nd number: 15/21
75/54 + 15/21 is 265/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
75/54 = 75 × 7/54 × 7 = 525/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
15/21 = 15 × 18/21 × 18 = 270/378 - Add the two like fractions:
525/378 + 270/378 = 525 + 270/378 = 795/378 - 795/378 simplified gives 265/126
- So, 75/54 + 15/21 = 265/126
In mixed form: 213/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/54+30/21 75/54+15/42 75/54+45/21 75/54+15/63 75/54+75/21