Add 5/21 and 6/40
5/21 + 6/40 is 163/420.
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,
5/21 = 5 × 40/21 × 40 = 200/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
6/40 = 6 × 21/40 × 21 = 126/840 - Add the two like fractions:
200/840 + 126/840 = 200 + 126/840 = 326/840 - 326/840 simplified gives 163/420
- So, 5/21 + 6/40 = 163/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+6/40 5/21+12/40 5/42+6/40 5/21+6/80 15/21+6/40 5/21+18/40 5/63+6/40 25/21+6/40 5/21+30/40 35/21+6/40 5/21+42/40