Subtract 4/80 from 72/18
1st number: 4 0/18, 2nd number: 4/80
72/18 - 4/80 is 79/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
72/18 = 72 × 40/18 × 40 = 2880/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
4/80 = 4 × 9/80 × 9 = 36/720 - Subtract the two like fractions:
2880/720 - 36/720 = 2880 - 36/720 = 2844/720 - After reducing the fraction, the answer is 79/20
- In mixed form: 319/20
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