Add 42/21 and 40/25
1st number: 2 0/21, 2nd number: 1 15/25
42/21 + 40/25 is 18/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
42/21 = 42 × 25/21 × 25 = 1050/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
40/25 = 40 × 21/25 × 21 = 840/525 - Add the two like fractions:
1050/525 + 840/525 = 1050 + 840/525 = 1890/525 - 1890/525 simplified gives 18/5
- So, 42/21 + 40/25 = 18/5
In mixed form: 33/5
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