Add 21/70 and 21/12
1st number: 21/70, 2nd number: 1 9/12
21/70 + 21/12 is 41/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
21/70 = 21 × 6/70 × 6 = 126/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
21/12 = 21 × 35/12 × 35 = 735/420 - Add the two like fractions:
126/420 + 735/420 = 126 + 735/420 = 861/420 - 861/420 simplified gives 41/20
- So, 21/70 + 21/12 = 41/20
In mixed form: 21/20
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