Add 3/20 and 12/42
3/20 + 12/42 is 61/140.
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,
3/20 = 3 × 21/20 × 21 = 63/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
12/42 = 12 × 10/42 × 10 = 120/420 - Add the two like fractions:
63/420 + 120/420 = 63 + 120/420 = 183/420 - 183/420 simplified gives 61/140
- So, 3/20 + 12/42 = 61/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20+12/42 3/20+24/42 3/40+12/42 3/20+12/84 9/20+12/42 3/20+36/42 3/60+12/42 15/20+12/42 3/20+60/42 21/20+12/42 3/20+84/42