Add 15/10 and 80/42
1st number: 1 5/10, 2nd number: 1 38/42
15/10 + 80/42 is 143/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
15/10 = 15 × 21/10 × 21 = 315/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Add the two like fractions:
315/210 + 400/210 = 315 + 400/210 = 715/210 - 715/210 simplified gives 143/42
- So, 15/10 + 80/42 = 143/42
In mixed form: 317/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/10+80/42 15/20+80/42 15/10+80/84 45/10+80/42 15/30+80/42 75/10+80/42 15/50+80/42 15/70+80/42