Add 4/42 and 40/70
4/42 + 40/70 is 2/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
4/42 = 4 × 5/42 × 5 = 20/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
40/70 = 40 × 3/70 × 3 = 120/210 - Add the two like fractions:
20/210 + 120/210 = 20 + 120/210 = 140/210 - 140/210 simplified gives 2/3
- So, 4/42 + 40/70 = 2/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/42+40/70 4/42+80/70 4/84+40/70 12/42+40/70 20/42+40/70 28/42+40/70