Subtract 2/90 from 72/20
1st number: 3 12/20, 2nd number: 2/90
72/20 - 2/90 is 161/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 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 90 × 2 = 180,
2/90 = 2 × 2/90 × 2 = 4/180 - Subtract the two like fractions:
648/180 - 4/180 = 648 - 4/180 = 644/180 - After reducing the fraction, the answer is 161/45
- In mixed form: 326/45
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