Add 21/84 and 63/40
1st number: 21/84, 2nd number: 1 23/40
21/84 + 63/40 is 73/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
21/84 = 21 × 10/84 × 10 = 210/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
63/40 = 63 × 21/40 × 21 = 1323/840 - Add the two like fractions:
210/840 + 1323/840 = 210 + 1323/840 = 1533/840 - 1533/840 simplified gives 73/40
- So, 21/84 + 63/40 = 73/40
In mixed form: 133/40
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