Add 20/5 and 2/21, Solve 4 0/5 + 2/21 as a fraction

Add 20/5 and 2/21

1^st number: 4 0/5, 2^nd number: 2/21

20/5 + 2/21 is 86/21.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 5 × 21 = 105,
20/5 = 20 × 21/5 × 21 = 420/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
2/21 = 2 × 5/21 × 5 = 10/105
Add the two like fractions:
420/105 + 10/105 = 420 + 10/105 = 430/105
430/105 simplified gives 86/21
So, 20/5 + 2/21 = 86/21
In mixed form: 42/21

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