Subtract 9/45 from 12/20
12/20 - 9/45 is 2/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
12/20 = 12 × 9/20 × 9 = 108/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
9/45 = 9 × 4/45 × 4 = 36/180 - Subtract the two like fractions:
108/180 - 36/180 = 108 - 36/180 = 72/180 - After reducing the fraction, the answer is 2/5
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