Subtract 45/8 from 81/4
1st number: 20 1/4, 2nd number: 5 5/8
81/4 - 45/8 is 117/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 8 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8 - For the 1st fraction, since 4 × 2 = 8,
81/4 = 81 × 2/4 × 2 = 162/8 - Likewise, for the 2nd fraction, since 8 × 1 = 8,
45/8 = 45 × 1/8 × 1 = 45/8 - Subtract the two like fractions:
162/8 - 45/8 = 162 - 45/8 = 117/8 - In mixed form: 145/8
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