Add 18/70 and 21/12
1st number: 18/70, 2nd number: 1 9/12
18/70 + 21/12 is 281/140.
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,
18/70 = 18 × 6/70 × 6 = 108/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
21/12 = 21 × 35/12 × 35 = 735/420 - Add the two like fractions:
108/420 + 735/420 = 108 + 735/420 = 843/420 - 843/420 simplified gives 281/140
- So, 18/70 + 21/12 = 281/140
In mixed form: 21/140
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