Add 20/25 and 4/21
20/25 + 4/21 is 104/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
20/25 = 20 × 21/25 × 21 = 420/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
4/21 = 4 × 25/21 × 25 = 100/525 - Add the two like fractions:
420/525 + 100/525 = 420 + 100/525 = 520/525 - 520/525 simplified gives 104/105
- So, 20/25 + 4/21 = 104/105
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