Add 4/10 and 27/42
4/10 + 27/42 is 73/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
4/10 = 4 × 21/10 × 21 = 84/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
27/42 = 27 × 5/42 × 5 = 135/210 - Add the two like fractions:
84/210 + 135/210 = 84 + 135/210 = 219/210 - 219/210 simplified gives 73/70
- So, 4/10 + 27/42 = 73/70
In mixed form: 13/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/10+27/42 4/10+54/42 4/20+27/42 4/10+27/84 12/10+27/42 4/10+81/42 4/30+27/42 20/10+27/42 4/50+27/42 28/10+27/42 4/70+27/42