Add 63/42 and 90/21
1st number: 1 21/42, 2nd number: 4 6/21
63/42 + 90/21 is 81/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
63/42 = 63 × 1/42 × 1 = 63/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
90/21 = 90 × 2/21 × 2 = 180/42 - Add the two like fractions:
63/42 + 180/42 = 63 + 180/42 = 243/42 - 243/42 simplified gives 81/14
- So, 63/42 + 90/21 = 81/14
In mixed form: 511/14
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