Add 20/70 and 27/42
20/70 + 27/42 is 13/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
20/70 = 20 × 3/70 × 3 = 60/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
27/42 = 27 × 5/42 × 5 = 135/210 - Add the two like fractions:
60/210 + 135/210 = 60 + 135/210 = 195/210 - 195/210 simplified gives 13/14
- So, 20/70 + 27/42 = 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+27/42 20/70+54/42 20/70+27/84 60/70+27/42 20/70+81/42