Add 2/40 and 3/21
2/40 + 3/21 is 27/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
2/40 = 2 × 21/40 × 21 = 42/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
3/21 = 3 × 40/21 × 40 = 120/840 - Add the two like fractions:
42/840 + 120/840 = 42 + 120/840 = 162/840 - 162/840 simplified gives 27/140
- So, 2/40 + 3/21 = 27/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/40+3/21 2/40+6/21 2/80+3/21 2/40+3/42 6/40+3/21 2/40+9/21 2/40+3/63 10/40+3/21 2/40+15/21 14/40+3/21