Add 81/28 and 30/70
1st number: 2 25/28, 2nd number: 30/70
81/28 + 30/70 is 93/28.
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,
81/28 = 81 × 5/28 × 5 = 405/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
30/70 = 30 × 2/70 × 2 = 60/140 - Add the two like fractions:
405/140 + 60/140 = 405 + 60/140 = 465/140 - 465/140 simplified gives 93/28
- So, 81/28 + 30/70 = 93/28
In mixed form: 39/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/28+60/70 81/56+30/70 81/28+90/70 81/84+30/70