Add 21/25 and 12/45
21/25 + 12/45 is 83/75.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 45 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 25 × 9 = 225,
21/25 = 21 × 9/25 × 9 = 189/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
12/45 = 12 × 5/45 × 5 = 60/225 - Add the two like fractions:
189/225 + 60/225 = 189 + 60/225 = 249/225 - 249/225 simplified gives 83/75
- So, 21/25 + 12/45 = 83/75
In mixed form: 18/75
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