Add 3/21 and 6/40
3/21 + 6/40 is 41/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
3/21 = 3 × 40/21 × 40 = 120/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
6/40 = 6 × 21/40 × 21 = 126/840 - Add the two like fractions:
120/840 + 126/840 = 120 + 126/840 = 246/840 - 246/840 simplified gives 41/140
- So, 3/21 + 6/40 = 41/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+6/40 3/21+12/40 3/42+6/40 3/21+6/80 9/21+6/40 3/21+18/40 3/63+6/40 15/21+6/40 3/21+30/40 3/21+42/40