Add 15/81 and 3/70
15/81 + 3/70 is 431/1890.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 70 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 81 × 70 = 5670,
15/81 = 15 × 70/81 × 70 = 1050/5670 - Likewise, for the 2nd fraction, since 70 × 81 = 5670,
3/70 = 3 × 81/70 × 81 = 243/5670 - Add the two like fractions:
1050/5670 + 243/5670 = 1050 + 243/5670 = 1293/5670 - 1293/5670 simplified gives 431/1890
- So, 15/81 + 3/70 = 431/1890
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/81+3/70 15/81+6/70 45/81+3/70 15/81+9/70 75/81+3/70 15/81+15/70 15/81+21/70