Add 20/28 and 90/98
20/28 + 90/98 is 80/49.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 98 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 98 × 2 = 196,
90/98 = 90 × 2/98 × 2 = 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 + 90/98 = 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+90/98 20/56+90/98 60/28+90/98 20/84+90/98