Add 18/8 and 21/45
1st number: 2 2/8, 2nd number: 21/45
18/8 + 21/45 is 163/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
18/8 = 18 × 45/8 × 45 = 810/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
21/45 = 21 × 8/45 × 8 = 168/360 - Add the two like fractions:
810/360 + 168/360 = 810 + 168/360 = 978/360 - 978/360 simplified gives 163/60
- So, 18/8 + 21/45 = 163/60
In mixed form: 243/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+21/45 18/8+42/45 18/16+21/45 18/8+21/90 54/8+21/45 18/8+63/45 18/24+21/45 90/8+21/45 18/40+21/45 18/56+21/45