Add 84/20 and 45/28
1st number: 4 4/20, 2nd number: 1 17/28
84/20 + 45/28 is 813/140.
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,
84/20 = 84 × 7/20 × 7 = 588/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
45/28 = 45 × 5/28 × 5 = 225/140 - Add the two like fractions:
588/140 + 225/140 = 588 + 225/140 = 813/140 - So, 84/20 + 45/28 = 813/140
In mixed form: 5113/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+90/28 84/40+45/28 84/20+45/56 84/60+45/28 84/20+45/84