Add 6/40 and 15/21
6/40 + 15/21 is 121/140.
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,
6/40 = 6 × 21/40 × 21 = 126/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
15/21 = 15 × 40/21 × 40 = 600/840 - Add the two like fractions:
126/840 + 600/840 = 126 + 600/840 = 726/840 - 726/840 simplified gives 121/140
- So, 6/40 + 15/21 = 121/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/40+15/21 6/40+30/21 6/80+15/21 6/40+15/42 18/40+15/21 6/40+45/21 6/40+15/63 30/40+15/21 6/40+75/21 42/40+15/21