Add 5/20 and 9/42
5/20 + 9/42 is 13/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
5/20 = 5 × 21/20 × 21 = 105/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
9/42 = 9 × 10/42 × 10 = 90/420 - Add the two like fractions:
105/420 + 90/420 = 105 + 90/420 = 195/420 - 195/420 simplified gives 13/28
- So, 5/20 + 9/42 = 13/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20+9/42 5/20+18/42 5/40+9/42 5/20+9/84 15/20+9/42 5/20+27/42 5/60+9/42 25/20+9/42 5/20+45/42 35/20+9/42 5/20+63/42