Add 7/84 and 40/20
1st number: 7/84, 2nd number: 2 0/20
7/84 + 40/20 is 25/12.
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,
7/84 = 7 × 5/84 × 5 = 35/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
40/20 = 40 × 21/20 × 21 = 840/420 - Add the two like fractions:
35/420 + 840/420 = 35 + 840/420 = 875/420 - 875/420 simplified gives 25/12
- So, 7/84 + 40/20 = 25/12
In mixed form: 21/12
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