Add 42/45 and 80/42
1st number: 42/45, 2nd number: 1 38/42
42/45 + 80/42 is 298/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
42/45 = 42 × 14/45 × 14 = 588/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
80/42 = 80 × 15/42 × 15 = 1200/630 - Add the two like fractions:
588/630 + 1200/630 = 588 + 1200/630 = 1788/630 - 1788/630 simplified gives 298/105
- So, 42/45 + 80/42 = 298/105
In mixed form: 288/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/45+80/42 42/90+80/42 42/45+80/84