Add 14/21 and 12/40
14/21 + 12/40 is 29/30.
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,
14/21 = 14 × 40/21 × 40 = 560/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
12/40 = 12 × 21/40 × 21 = 252/840 - Add the two like fractions:
560/840 + 252/840 = 560 + 252/840 = 812/840 - 812/840 simplified gives 29/30
- So, 14/21 + 12/40 = 29/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/21+12/40 14/21+24/40 14/42+12/40 14/21+12/80 42/21+12/40 14/21+36/40 14/63+12/40 70/21+12/40 14/21+60/40 98/21+12/40 14/21+84/40