Add 42/45 and 21/25
42/45 + 21/25 is 133/75.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 25 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 45 × 5 = 225,
42/45 = 42 × 5/45 × 5 = 210/225 - Likewise, for the 2nd fraction, since 25 × 9 = 225,
21/25 = 21 × 9/25 × 9 = 189/225 - Add the two like fractions:
210/225 + 189/225 = 210 + 189/225 = 399/225 - 399/225 simplified gives 133/75
- So, 42/45 + 21/25 = 133/75
In mixed form: 158/75
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