Add 1/5 and 80/42
1st number: 1/5, 2nd number: 1 38/42
1/5 + 80/42 is 221/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
1/5 = 1 × 42/5 × 42 = 42/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Add the two like fractions:
42/210 + 400/210 = 42 + 400/210 = 442/210 - 442/210 simplified gives 221/105
- So, 1/5 + 80/42 = 221/105
In mixed form: 211/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/5+80/42 1/10+80/42 1/5+80/84 3/5+80/42 1/15+80/42 1/25+80/42 7/5+80/42 1/35+80/42