Add 3/42 and 4/40
3/42 + 4/40 is 6/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
3/42 = 3 × 20/42 × 20 = 60/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
4/40 = 4 × 21/40 × 21 = 84/840 - Add the two like fractions:
60/840 + 84/840 = 60 + 84/840 = 144/840 - 144/840 simplified gives 6/35
- So, 3/42 + 4/40 = 6/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42+4/40 3/42+8/40 3/84+4/40 3/42+4/80 9/42+4/40 3/42+12/40 15/42+4/40 3/42+20/40 21/42+4/40 3/42+28/40