Add 15/28 and 20/70
15/28 + 20/70 is 23/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
15/28 = 15 × 5/28 × 5 = 75/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
20/70 = 20 × 2/70 × 2 = 40/140 - Add the two like fractions:
75/140 + 40/140 = 75 + 40/140 = 115/140 - 115/140 simplified gives 23/28
- So, 15/28 + 20/70 = 23/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28+20/70 15/28+40/70 15/56+20/70 45/28+20/70 15/28+60/70 15/84+20/70 75/28+20/70