Add 42/7 and 40/90
1st number: 6 0/7, 2nd number: 40/90
42/7 + 40/90 is 58/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
42/7 = 42 × 90/7 × 90 = 3780/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
40/90 = 40 × 7/90 × 7 = 280/630 - Add the two like fractions:
3780/630 + 280/630 = 3780 + 280/630 = 4060/630 - 4060/630 simplified gives 58/9
- So, 42/7 + 40/90 = 58/9
In mixed form: 64/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/7+40/90 42/7+80/90 42/14+40/90 42/21+40/90 42/35+40/90 42/49+40/90