Add 15/8 and 54/90
1st number: 1 7/8, 2nd number: 54/90
15/8 + 54/90 is 99/40.
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,
54/90 = 54 × 4/90 × 4 = 216/360 - Add the two like fractions:
675/360 + 216/360 = 675 + 216/360 = 891/360 - 891/360 simplified gives 99/40
- So, 15/8 + 54/90 = 99/40
In mixed form: 219/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/8+54/90 15/16+54/90 45/8+54/90 15/24+54/90 75/8+54/90 15/40+54/90 15/56+54/90