Add 3/20 and 4/42
3/20 + 4/42 is 103/420.
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,
4/42 = 4 × 10/42 × 10 = 40/420 - Add the two like fractions:
63/420 + 40/420 = 63 + 40/420 = 103/420 - So, 3/20 + 4/42 = 103/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20+4/42 3/20+8/42 3/40+4/42 3/20+4/84 9/20+4/42 3/20+12/42 3/60+4/42 15/20+4/42 3/20+20/42 21/20+4/42 3/20+28/42