Add 21/24 and 28/70
21/24 + 28/70 is 51/40.
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,
28/70 = 28 × 12/70 × 12 = 336/840 - Add the two like fractions:
735/840 + 336/840 = 735 + 336/840 = 1071/840 - 1071/840 simplified gives 51/40
- So, 21/24 + 28/70 = 51/40
In mixed form: 111/40
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