Add 21/24 and 45/40
1st number: 21/24, 2nd number: 1 5/40
21/24 + 45/40 is 2/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 24 × 5 = 120,
21/24 = 21 × 5/24 × 5 = 105/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
45/40 = 45 × 3/40 × 3 = 135/120 - Add the two like fractions:
105/120 + 135/120 = 105 + 135/120 = 240/120 - 240/120 simplified gives 2/1
- So, 21/24 + 45/40 = 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24+45/40 21/24+90/40 21/48+45/40 21/24+45/80 63/24+45/40 21/72+45/40