Add 18/8 and 45/15
1st number: 2 2/8, 2nd number: 3 0/15
18/8 + 45/15 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
18/8 = 18 × 15/8 × 15 = 270/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
45/15 = 45 × 8/15 × 8 = 360/120 - Add the two like fractions:
270/120 + 360/120 = 270 + 360/120 = 630/120 - 630/120 simplified gives 21/4
- So, 18/8 + 45/15 = 21/4
In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+45/15 18/8+90/15 18/16+45/15 18/8+45/30 54/8+45/15 18/24+45/15 90/8+45/15 18/40+45/15 18/8+45/75 18/56+45/15