Subtract 42/45 from 12/4
1st number: 3 0/4, 2nd number: 42/45
12/4 - 42/45 is 31/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
12/4 = 12 × 45/4 × 45 = 540/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
42/45 = 42 × 4/45 × 4 = 168/180 - Subtract the two like fractions:
540/180 - 168/180 = 540 - 168/180 = 372/180 - After reducing the fraction, the answer is 31/15
- In mixed form: 21/15
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