Add 50/70 and 20/81
50/70 + 20/81 is 545/567.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 81 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 70 × 81 = 5670,
50/70 = 50 × 81/70 × 81 = 4050/5670 - Likewise, for the 2nd fraction, since 81 × 70 = 5670,
20/81 = 20 × 70/81 × 70 = 1400/5670 - Add the two like fractions:
4050/5670 + 1400/5670 = 4050 + 1400/5670 = 5450/5670 - 5450/5670 simplified gives 545/567
- So, 50/70 + 20/81 = 545/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/70+40/81 50/70+60/81