Add 5/8 and 21/45
5/8 + 21/45 is 131/120.
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,
5/8 = 5 × 45/8 × 45 = 225/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
21/45 = 21 × 8/45 × 8 = 168/360 - Add the two like fractions:
225/360 + 168/360 = 225 + 168/360 = 393/360 - 393/360 simplified gives 131/120
- So, 5/8 + 21/45 = 131/120
In mixed form: 111/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/8+21/45 5/8+42/45 5/16+21/45 5/8+21/90 15/8+21/45 5/8+63/45 5/24+21/45 25/8+21/45 5/40+21/45 35/8+21/45 5/56+21/45