Add 20/21 and 63/54
1st number: 20/21, 2nd number: 1 9/54
20/21 + 63/54 is 89/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
20/21 = 20 × 18/21 × 18 = 360/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
63/54 = 63 × 7/54 × 7 = 441/378 - Add the two like fractions:
360/378 + 441/378 = 360 + 441/378 = 801/378 - 801/378 simplified gives 89/42
- So, 20/21 + 63/54 = 89/42
In mixed form: 25/42
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