Add 27/21 and 3/40
1st number: 1 6/21, 2nd number: 3/40
27/21 + 3/40 is 381/280.
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,
27/21 = 27 × 40/21 × 40 = 1080/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
3/40 = 3 × 21/40 × 21 = 63/840 - Add the two like fractions:
1080/840 + 63/840 = 1080 + 63/840 = 1143/840 - 1143/840 simplified gives 381/280
- So, 27/21 + 3/40 = 381/280
In mixed form: 1101/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+3/40 27/21+6/40 27/42+3/40 27/21+3/80 81/21+3/40 27/21+9/40 27/63+3/40 27/21+15/40 27/21+21/40