Subtract 28/72 from 28/20
1st number: 1 8/20, 2nd number: 28/72
28/20 - 28/72 is 91/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
28/20 = 28 × 18/20 × 18 = 504/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
28/72 = 28 × 5/72 × 5 = 140/360 - Subtract the two like fractions:
504/360 - 140/360 = 504 - 140/360 = 364/360 - After reducing the fraction, the answer is 91/90
- In mixed form: 11/90
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