Subtract 4/72 from 90/80
1st number: 1 10/80, 2nd number: 4/72
90/80 - 4/72 is 77/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 72 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
90/80 = 90 × 9/80 × 9 = 810/720 - Likewise, for the 2nd fraction, since 72 × 10 = 720,
4/72 = 4 × 10/72 × 10 = 40/720 - Subtract the two like fractions:
810/720 - 40/720 = 810 - 40/720 = 770/720 - After reducing the fraction, the answer is 77/72
- In mixed form: 15/72
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