Add 30/20 and 45/28
1st number: 1 10/20, 2nd number: 1 17/28
30/20 + 45/28 is 87/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
30/20 = 30 × 7/20 × 7 = 210/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
45/28 = 45 × 5/28 × 5 = 225/140 - Add the two like fractions:
210/140 + 225/140 = 210 + 225/140 = 435/140 - 435/140 simplified gives 87/28
- So, 30/20 + 45/28 = 87/28
In mixed form: 33/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20+45/28 30/20+90/28 30/40+45/28 30/20+45/56 90/20+45/28 30/60+45/28 30/20+45/84