Add 21/45 and 3/24
21/45 + 3/24 is 71/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 24 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
21/45 = 21 × 8/45 × 8 = 168/360 - Likewise, for the 2nd fraction, since 24 × 15 = 360,
3/24 = 3 × 15/24 × 15 = 45/360 - Add the two like fractions:
168/360 + 45/360 = 168 + 45/360 = 213/360 - 213/360 simplified gives 71/120
- So, 21/45 + 3/24 = 71/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+3/24 21/45+6/24 21/90+3/24 21/45+3/48 63/45+3/24 21/45+9/24 21/45+3/72 21/45+15/24 21/45+21/24