Add 25/28 and 42/30
1st number: 25/28, 2nd number: 1 12/30
25/28 + 42/30 is 321/140.
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,
25/28 = 25 × 15/28 × 15 = 375/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
42/30 = 42 × 14/30 × 14 = 588/420 - Add the two like fractions:
375/420 + 588/420 = 375 + 588/420 = 963/420 - 963/420 simplified gives 321/140
- So, 25/28 + 42/30 = 321/140
In mixed form: 241/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/28+42/30 25/28+84/30 25/56+42/30 25/28+42/60 75/28+42/30 25/84+42/30 25/28+42/90