Add 9/45 and 21/8
1st number: 9/45, 2nd number: 2 5/8
9/45 + 21/8 is 113/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
9/45 = 9 × 8/45 × 8 = 72/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
21/8 = 21 × 45/8 × 45 = 945/360 - Add the two like fractions:
72/360 + 945/360 = 72 + 945/360 = 1017/360 - 1017/360 simplified gives 113/40
- So, 9/45 + 21/8 = 113/40
In mixed form: 233/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/45+21/8 9/45+42/8 9/90+21/8 9/45+21/16 27/45+21/8 9/45+63/8 9/45+21/24 9/45+21/40 63/45+21/8 9/45+21/56