Subtract 4/45 from 72/20
1st number: 3 12/20, 2nd number: 4/45
72/20 - 4/45 is 158/45.
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,
4/45 = 4 × 4/45 × 4 = 16/180 - Subtract the two like fractions:
648/180 - 16/180 = 648 - 16/180 = 632/180 - After reducing the fraction, the answer is 158/45
- In mixed form: 323/45
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