Add 2/20 and 12/42
2/20 + 12/42 is 27/70.
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,
2/20 = 2 × 21/20 × 21 = 42/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
12/42 = 12 × 10/42 × 10 = 120/420 - Add the two like fractions:
42/420 + 120/420 = 42 + 120/420 = 162/420 - 162/420 simplified gives 27/70
- So, 2/20 + 12/42 = 27/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/20+12/42 2/20+24/42 2/40+12/42 2/20+12/84 6/20+12/42 2/20+36/42 2/60+12/42 10/20+12/42 2/20+60/42 14/20+12/42 2/20+84/42