Subtract 30/45 from 72/20
1st number: 3 12/20, 2nd number: 30/45
72/20 - 30/45 is 44/15.
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,
72/20 = 72 × 9/20 × 9 = 648/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
30/45 = 30 × 4/45 × 4 = 120/180 - Subtract the two like fractions:
648/180 - 120/180 = 648 - 120/180 = 528/180 - After reducing the fraction, the answer is 44/15
- In mixed form: 214/15
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