Add 3/40 and 27/42
3/40 + 27/42 is 201/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
3/40 = 3 × 21/40 × 21 = 63/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
27/42 = 27 × 20/42 × 20 = 540/840 - Add the two like fractions:
63/840 + 540/840 = 63 + 540/840 = 603/840 - 603/840 simplified gives 201/280
- So, 3/40 + 27/42 = 201/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/40+27/42 3/40+54/42 3/80+27/42 3/40+27/84 9/40+27/42 3/40+81/42 15/40+27/42 21/40+27/42