Subtract 81/80 from 28/4
1st number: 7 0/4, 2nd number: 1 1/80
28/4 - 81/80 is 479/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
28/4 = 28 × 20/4 × 20 = 560/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
81/80 = 81 × 1/80 × 1 = 81/80 - Subtract the two like fractions:
560/80 - 81/80 = 560 - 81/80 = 479/80 - In mixed form: 579/80
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