Add 42/49 and 75/20
1st number: 42/49, 2nd number: 3 15/20
42/49 + 75/20 is 129/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 20 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 49 × 20 = 980,
42/49 = 42 × 20/49 × 20 = 840/980 - Likewise, for the 2nd fraction, since 20 × 49 = 980,
75/20 = 75 × 49/20 × 49 = 3675/980 - Add the two like fractions:
840/980 + 3675/980 = 840 + 3675/980 = 4515/980 - 4515/980 simplified gives 129/28
- So, 42/49 + 75/20 = 129/28
In mixed form: 417/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/49+75/20 42/98+75/20 42/49+75/40 42/49+75/60