Add 54/90 and 15/8
1st number: 54/90, 2nd number: 1 7/8
54/90 + 15/8 is 99/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
54/90 = 54 × 4/90 × 4 = 216/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
15/8 = 15 × 45/8 × 45 = 675/360 - Add the two like fractions:
216/360 + 675/360 = 216 + 675/360 = 891/360 - 891/360 simplified gives 99/40
- So, 54/90 + 15/8 = 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: 54/90+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