Add 81/20 and 5/70
1st number: 4 1/20, 2nd number: 5/70
81/20 + 5/70 is 577/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
81/20 = 81 × 7/20 × 7 = 567/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
5/70 = 5 × 2/70 × 2 = 10/140 - Add the two like fractions:
567/140 + 10/140 = 567 + 10/140 = 577/140 - So, 81/20 + 5/70 = 577/140
In mixed form: 417/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/20+10/70 81/40+5/70 81/20+15/70 81/60+5/70 81/20+25/70 81/20+35/70