Add 7/28 and 15/45
7/28 + 15/45 is 7/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
7/28 = 7 × 45/28 × 45 = 315/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
15/45 = 15 × 28/45 × 28 = 420/1260 - Add the two like fractions:
315/1260 + 420/1260 = 315 + 420/1260 = 735/1260 - 735/1260 simplified gives 7/12
- So, 7/28 + 15/45 = 7/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+15/45 7/28+30/45 7/56+15/45 7/28+15/90 21/28+15/45 7/84+15/45 35/28+15/45 7/28+75/45 49/28+15/45