Add 15/28 and 20/30
15/28 + 20/30 is 101/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
15/28 = 15 × 15/28 × 15 = 225/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
20/30 = 20 × 14/30 × 14 = 280/420 - Add the two like fractions:
225/420 + 280/420 = 225 + 280/420 = 505/420 - 505/420 simplified gives 101/84
- So, 15/28 + 20/30 = 101/84
In mixed form: 117/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28+20/30 15/28+40/30 15/56+20/30 15/28+20/60 45/28+20/30 15/28+60/30 15/84+20/30 15/28+20/90 75/28+20/30