Add 54/20 and 70/49
1st number: 2 14/20, 2nd number: 1 21/49
54/20 + 70/49 is 289/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 49 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 20 × 49 = 980,
54/20 = 54 × 49/20 × 49 = 2646/980 - Likewise, for the 2nd fraction, since 49 × 20 = 980,
70/49 = 70 × 20/49 × 20 = 1400/980 - Add the two like fractions:
2646/980 + 1400/980 = 2646 + 1400/980 = 4046/980 - 4046/980 simplified gives 289/70
- So, 54/20 + 70/49 = 289/70
In mixed form: 49/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/40+70/49 54/20+70/98 54/60+70/49