Subtract 20/45 from 54/12
1st number: 4 6/12, 2nd number: 20/45
54/12 - 20/45 is 73/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
54/12 = 54 × 15/12 × 15 = 810/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Subtract the two like fractions:
810/180 - 80/180 = 810 - 80/180 = 730/180 - After reducing the fraction, the answer is 73/18
- In mixed form: 41/18
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