Add 15/8 and 27/90
1st number: 1 7/8, 2nd number: 27/90
15/8 + 27/90 is 87/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
15/8 = 15 × 45/8 × 45 = 675/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
27/90 = 27 × 4/90 × 4 = 108/360 - Add the two like fractions:
675/360 + 108/360 = 675 + 108/360 = 783/360 - 783/360 simplified gives 87/40
- So, 15/8 + 27/90 = 87/40
In mixed form: 27/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/8+27/90 15/8+54/90 15/16+27/90 45/8+27/90 15/8+81/90 15/24+27/90 75/8+27/90 15/40+27/90 15/56+27/90