Add 20/28 and 45/49
20/28 + 45/49 is 80/49.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 49 is 196
Next, find the equivalent fraction of both fractional numbers with denominator 196 - For the 1st fraction, since 28 × 7 = 196,
20/28 = 20 × 7/28 × 7 = 140/196 - Likewise, for the 2nd fraction, since 49 × 4 = 196,
45/49 = 45 × 4/49 × 4 = 180/196 - Add the two like fractions:
140/196 + 180/196 = 140 + 180/196 = 320/196 - 320/196 simplified gives 80/49
- So, 20/28 + 45/49 = 80/49
In mixed form: 131/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28+45/49 20/28+90/49 20/56+45/49 20/28+45/98 60/28+45/49 20/84+45/49