Add 20/15 and 8/42
1st number: 1 5/15, 2nd number: 8/42
20/15 + 8/42 is 32/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
20/15 = 20 × 14/15 × 14 = 280/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
8/42 = 8 × 5/42 × 5 = 40/210 - Add the two like fractions:
280/210 + 40/210 = 280 + 40/210 = 320/210 - 320/210 simplified gives 32/21
- So, 20/15 + 8/42 = 32/21
In mixed form: 111/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+8/42 20/15+16/42 20/30+8/42 20/15+8/84 60/15+8/42 20/15+24/42 20/45+8/42 20/15+40/42 20/75+8/42 20/15+56/42