Add 40/21 and 20/84
1st number: 1 19/21, 2nd number: 20/84
40/21 + 20/84 is 15/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
40/21 = 40 × 4/21 × 4 = 160/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
20/84 = 20 × 1/84 × 1 = 20/84 - Add the two like fractions:
160/84 + 20/84 = 160 + 20/84 = 180/84 - 180/84 simplified gives 15/7
- So, 40/21 + 20/84 = 15/7
In mixed form: 21/7
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