Add 1/42 and 42/45
1/42 + 42/45 is 67/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
1/42 = 1 × 15/42 × 15 = 15/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
42/45 = 42 × 14/45 × 14 = 588/630 - Add the two like fractions:
15/630 + 588/630 = 15 + 588/630 = 603/630 - 603/630 simplified gives 67/70
- So, 1/42 + 42/45 = 67/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42+42/45 1/42+84/45 1/84+42/45 1/42+42/90 3/42+42/45 5/42+42/45 7/42+42/45