Add 21/75 and 42/21
1st number: 21/75, 2nd number: 2 0/21
21/75 + 42/21 is 57/25.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
21/75 = 21 × 7/75 × 7 = 147/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
42/21 = 42 × 25/21 × 25 = 1050/525 - Add the two like fractions:
147/525 + 1050/525 = 147 + 1050/525 = 1197/525 - 1197/525 simplified gives 57/25
- So, 21/75 + 42/21 = 57/25
In mixed form: 27/25
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