Add 21/24 and 35/70
21/24 + 35/70 is 11/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 70 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 24 × 35 = 840,
21/24 = 21 × 35/24 × 35 = 735/840 - Likewise, for the 2nd fraction, since 70 × 12 = 840,
35/70 = 35 × 12/70 × 12 = 420/840 - Add the two like fractions:
735/840 + 420/840 = 735 + 420/840 = 1155/840 - 1155/840 simplified gives 11/8
- So, 21/24 + 35/70 = 11/8
In mixed form: 13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24+35/70 21/48+35/70 63/24+35/70 21/72+35/70