Add 15/4 and 75/90
1st number: 3 3/4, 2nd number: 75/90
15/4 + 75/90 is 55/12.
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,
15/4 = 15 × 45/4 × 45 = 675/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
75/90 = 75 × 2/90 × 2 = 150/180 - Add the two like fractions:
675/180 + 150/180 = 675 + 150/180 = 825/180 - 825/180 simplified gives 55/12
- So, 15/4 + 75/90 = 55/12
In mixed form: 47/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/4+75/90 15/8+75/90 45/4+75/90 15/12+75/90 75/4+75/90 15/20+75/90 15/28+75/90