Add 81/54 and 20/70
1st number: 1 27/54, 2nd number: 20/70
81/54 + 20/70 is 25/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 70 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 54 × 35 = 1890,
81/54 = 81 × 35/54 × 35 = 2835/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
20/70 = 20 × 27/70 × 27 = 540/1890 - Add the two like fractions:
2835/1890 + 540/1890 = 2835 + 540/1890 = 3375/1890 - 3375/1890 simplified gives 25/14
- So, 81/54 + 20/70 = 25/14
In mixed form: 111/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/54+40/70 81/54+60/70