Add 84/7 and 40/90
1st number: 12 0/7, 2nd number: 40/90
84/7 + 40/90 is 112/9.
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,
84/7 = 84 × 90/7 × 90 = 7560/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
40/90 = 40 × 7/90 × 7 = 280/630 - Add the two like fractions:
7560/630 + 280/630 = 7560 + 280/630 = 7840/630 - 7840/630 simplified gives 112/9
- So, 84/7 + 40/90 = 112/9
In mixed form: 124/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/7+80/90 84/14+40/90 84/21+40/90 84/35+40/90 84/49+40/90