Add 18/84 and 63/20
1st number: 18/84, 2nd number: 3 3/20
18/84 + 63/20 is 471/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
18/84 = 18 × 5/84 × 5 = 90/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
63/20 = 63 × 21/20 × 21 = 1323/420 - Add the two like fractions:
90/420 + 1323/420 = 90 + 1323/420 = 1413/420 - 1413/420 simplified gives 471/140
- So, 18/84 + 63/20 = 471/140
In mixed form: 351/140
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