Add 30/28 and 45/70
1st number: 1 2/28, 2nd number: 45/70
30/28 + 45/70 is 12/7.
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,
30/28 = 30 × 5/28 × 5 = 150/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
45/70 = 45 × 2/70 × 2 = 90/140 - Add the two like fractions:
150/140 + 90/140 = 150 + 90/140 = 240/140 - 240/140 simplified gives 12/7
- So, 30/28 + 45/70 = 12/7
In mixed form: 15/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28+45/70 30/28+90/70 30/56+45/70 90/28+45/70 30/84+45/70