Add 90/7 and 15/45
1st number: 12 6/7, 2nd number: 15/45
90/7 + 15/45 is 277/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
90/7 = 90 × 45/7 × 45 = 4050/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
15/45 = 15 × 7/45 × 7 = 105/315 - Add the two like fractions:
4050/315 + 105/315 = 4050 + 105/315 = 4155/315 - 4155/315 simplified gives 277/21
- So, 90/7 + 15/45 = 277/21
In mixed form: 134/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7+30/45 90/14+15/45 90/7+15/90 90/21+15/45 90/7+75/45 90/35+15/45 90/49+15/45