Add 21/24 and 10/42
21/24 + 10/42 is 187/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
10/42 = 10 × 4/42 × 4 = 40/168 - Add the two like fractions:
147/168 + 40/168 = 147 + 40/168 = 187/168 - So, 21/24 + 10/42 = 187/168
In mixed form: 119/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24+10/42 21/24+20/42 21/48+10/42 21/24+10/84 63/24+10/42 21/24+30/42 21/72+10/42 21/24+50/42 21/24+70/42