Add 18/7 and 15/90
1st number: 2 4/7, 2nd number: 15/90
18/7 + 15/90 is 115/42.
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,
18/7 = 18 × 90/7 × 90 = 1620/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Add the two like fractions:
1620/630 + 105/630 = 1620 + 105/630 = 1725/630 - 1725/630 simplified gives 115/42
- So, 18/7 + 15/90 = 115/42
In mixed form: 231/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/7+15/90 18/7+30/90 18/14+15/90 54/7+15/90 18/7+45/90 18/21+15/90 90/7+15/90 18/7+75/90 18/35+15/90 18/49+15/90