Add 15/90 and 45/7
1st number: 15/90, 2nd number: 6 3/7
15/90 + 45/7 is 277/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
45/7 = 45 × 90/7 × 90 = 4050/630 - Add the two like fractions:
105/630 + 4050/630 = 105 + 4050/630 = 4155/630 - 4155/630 simplified gives 277/42
- So, 15/90 + 45/7 = 277/42
In mixed form: 625/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90+45/7 15/90+90/7 15/90+45/14 45/90+45/7 15/90+45/21 75/90+45/7 15/90+45/35 15/90+45/49