Add 15/45 and 30/7
1st number: 15/45, 2nd number: 4 2/7
15/45 + 30/7 is 97/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
15/45 = 15 × 7/45 × 7 = 105/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
30/7 = 30 × 45/7 × 45 = 1350/315 - Add the two like fractions:
105/315 + 1350/315 = 105 + 1350/315 = 1455/315 - 1455/315 simplified gives 97/21
- So, 15/45 + 30/7 = 97/21
In mixed form: 413/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/45+30/7 15/45+60/7 15/90+30/7 15/45+30/14 15/45+90/7 15/45+30/21 75/45+30/7 15/45+30/35 15/45+30/49