Add 21/8 and 25/45
1st number: 2 5/8, 2nd number: 25/45
21/8 + 25/45 is 229/72.
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,
21/8 = 21 × 45/8 × 45 = 945/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
25/45 = 25 × 8/45 × 8 = 200/360 - Add the two like fractions:
945/360 + 200/360 = 945 + 200/360 = 1145/360 - 1145/360 simplified gives 229/72
- So, 21/8 + 25/45 = 229/72
In mixed form: 313/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8+25/45 21/8+50/45 21/16+25/45 21/8+25/90 63/8+25/45 21/8+75/45 21/24+25/45 21/40+25/45 21/56+25/45