Add 21/25 and 18/45
21/25 + 18/45 is 31/25.
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,
18/45 = 18 × 5/45 × 5 = 90/225 - Add the two like fractions:
189/225 + 90/225 = 189 + 90/225 = 279/225 - 279/225 simplified gives 31/25
- So, 21/25 + 18/45 = 31/25
In mixed form: 16/25
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