Add 25/28 and 15/70
25/28 + 15/70 is 31/28.
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,
25/28 = 25 × 5/28 × 5 = 125/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
15/70 = 15 × 2/70 × 2 = 30/140 - Add the two like fractions:
125/140 + 30/140 = 125 + 30/140 = 155/140 - 155/140 simplified gives 31/28
- So, 25/28 + 15/70 = 31/28
In mixed form: 13/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/28+15/70 25/28+30/70 25/56+15/70 75/28+15/70 25/28+45/70 25/84+15/70 25/28+75/70