Add 45/70 and 20/49
45/70 + 20/49 is 103/98.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 49 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 70 × 7 = 490,
45/70 = 45 × 7/70 × 7 = 315/490 - Likewise, for the 2nd fraction, since 49 × 10 = 490,
20/49 = 20 × 10/49 × 10 = 200/490 - Add the two like fractions:
315/490 + 200/490 = 315 + 200/490 = 515/490 - 515/490 simplified gives 103/98
- So, 45/70 + 20/49 = 103/98
In mixed form: 15/98
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+20/49 45/70+40/49 45/70+20/98 45/70+60/49