Add 42/24 and 21/84
1st number: 1 18/24, 2nd number: 21/84
42/24 + 21/84 is 2/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 84 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
42/24 = 42 × 7/24 × 7 = 294/168 - Likewise, for the 2nd fraction, since 84 × 2 = 168,
21/84 = 21 × 2/84 × 2 = 42/168 - Add the two like fractions:
294/168 + 42/168 = 294 + 42/168 = 336/168 - 336/168 simplified gives 2/1
- So, 42/24 + 21/84 = 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/24+21/84 42/24+42/84 42/48+21/84 42/24+63/84 42/72+21/84