Add 45/3 and 75/21
1st number: 15 0/3, 2nd number: 3 12/21
45/3 + 75/21 is 130/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
45/3 = 45 × 7/3 × 7 = 315/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
75/21 = 75 × 1/21 × 1 = 75/21 - Add the two like fractions:
315/21 + 75/21 = 315 + 75/21 = 390/21 - 390/21 simplified gives 130/7
- So, 45/3 + 75/21 = 130/7
In mixed form: 184/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3+75/21 45/6+75/21 45/3+75/42 45/9+75/21 45/3+75/63 45/15+75/21 45/21+75/21