Add 14/40 and 45/21
1st number: 14/40, 2nd number: 2 3/21
14/40 + 45/21 is 349/140.
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,
14/40 = 14 × 21/40 × 21 = 294/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
45/21 = 45 × 40/21 × 40 = 1800/840 - Add the two like fractions:
294/840 + 1800/840 = 294 + 1800/840 = 2094/840 - 2094/840 simplified gives 349/140
- So, 14/40 + 45/21 = 349/140
In mixed form: 269/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/40+45/21 14/40+90/21 14/80+45/21 14/40+45/42 42/40+45/21 14/40+45/63 70/40+45/21 98/40+45/21