Add 25/21 and 21/9, Solve 1 4/21 + 2 3/9 as a fraction

Add 25/21 and 21/9

1^st number: 1 4/21, 2^nd number: 2 3/9

25/21 + 21/9 is 74/21.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63

Next, find the equivalent fraction of both fractional numbers with denominator 63
For the 1st fraction, since 21 × 3 = 63,
25/21 = 25 × 3/21 × 3 = 75/63
Likewise, for the 2nd fraction, since 9 × 7 = 63,
21/9 = 21 × 7/9 × 7 = 147/63
Add the two like fractions:
75/63 + 147/63 = 75 + 147/63 = 222/63
222/63 simplified gives 74/21
So, 25/21 + 21/9 = 74/21
In mixed form: 311/21

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