Add 45/4 and 15/90
1st number: 11 1/4, 2nd number: 15/90
45/4 + 15/90 is 137/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
45/4 = 45 × 45/4 × 45 = 2025/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
15/90 = 15 × 2/90 × 2 = 30/180 - Add the two like fractions:
2025/180 + 30/180 = 2025 + 30/180 = 2055/180 - 2055/180 simplified gives 137/12
- So, 45/4 + 15/90 = 137/12
In mixed form: 115/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/4+15/90 45/4+30/90 45/8+15/90 45/4+45/90 45/12+15/90 45/4+75/90 45/20+15/90 45/28+15/90