Add 16/21 and 18/42
16/21 + 18/42 is 25/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
16/21 = 16 × 2/21 × 2 = 32/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
18/42 = 18 × 1/42 × 1 = 18/42 - Add the two like fractions:
32/42 + 18/42 = 32 + 18/42 = 50/42 - 50/42 simplified gives 25/21
- So, 16/21 + 18/42 = 25/21
In mixed form: 14/21
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