Subtract 1/90 from 81/4
1st number: 20 1/4, 2nd number: 1/90
81/4 - 1/90 is 3643/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
81/4 = 81 × 45/4 × 45 = 3645/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
1/90 = 1 × 2/90 × 2 = 2/180 - Subtract the two like fractions:
3645/180 - 2/180 = 3645 - 2/180 = 3643/180 - In mixed form: 2043/180
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