Add 1/42 and 80/90
1/42 + 80/90 is 115/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 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 90 × 7 = 630,
80/90 = 80 × 7/90 × 7 = 560/630 - Add the two like fractions:
15/630 + 560/630 = 15 + 560/630 = 575/630 - 575/630 simplified gives 115/126
- So, 1/42 + 80/90 = 115/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42+80/90 1/84+80/90 3/42+80/90 5/42+80/90 7/42+80/90