Add 21/6 and 70/40
1st number: 3 3/6, 2nd number: 1 30/40
21/6 + 70/40 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 6 × 20 = 120,
21/6 = 21 × 20/6 × 20 = 420/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
70/40 = 70 × 3/40 × 3 = 210/120 - Add the two like fractions:
420/120 + 210/120 = 420 + 210/120 = 630/120 - 630/120 simplified gives 21/4
- So, 21/6 + 70/40 = 21/4
In mixed form: 51/4
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