Add 36/21 and 7/40
1st number: 1 15/21, 2nd number: 7/40
36/21 + 7/40 is 529/280.
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,
36/21 = 36 × 40/21 × 40 = 1440/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
7/40 = 7 × 21/40 × 21 = 147/840 - Add the two like fractions:
1440/840 + 147/840 = 1440 + 147/840 = 1587/840 - 1587/840 simplified gives 529/280
- So, 36/21 + 7/40 = 529/280
In mixed form: 1249/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21+7/40 36/21+14/40 36/42+7/40 36/21+7/80 36/21+21/40 36/63+7/40 36/21+35/40 36/21+49/40