Add 21/2 and 70/40
1st number: 10 1/2, 2nd number: 1 30/40
21/2 + 70/40 is 49/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 2 × 20 = 40,
21/2 = 21 × 20/2 × 20 = 420/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
70/40 = 70 × 1/40 × 1 = 70/40 - Add the two like fractions:
420/40 + 70/40 = 420 + 70/40 = 490/40 - 490/40 simplified gives 49/4
- So, 21/2 + 70/40 = 49/4
In mixed form: 121/4
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