Subtract 90/7 from 45/4
1st number: 11 1/4, 2nd number: 12 6/7
45/4 - 90/7 is -45/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
45/4 = 45 × 7/4 × 7 = 315/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
90/7 = 90 × 4/7 × 4 = 360/28 - Subtract the two like fractions:
315/28 - 360/28 = 315 - 360/28 = -45/28
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