Add 20/42 and 5/49
20/42 + 5/49 is 85/147.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 49 is 294
Next, find the equivalent fraction of both fractional numbers with denominator 294 - For the 1st fraction, since 42 × 7 = 294,
20/42 = 20 × 7/42 × 7 = 140/294 - Likewise, for the 2nd fraction, since 49 × 6 = 294,
5/49 = 5 × 6/49 × 6 = 30/294 - Add the two like fractions:
140/294 + 30/294 = 140 + 30/294 = 170/294 - 170/294 simplified gives 85/147
- So, 20/42 + 5/49 = 85/147
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+5/49 20/42+10/49 20/84+5/49 20/42+5/98 60/42+5/49 20/42+15/49 20/42+25/49 20/42+35/49