Subtract 21/4 from 90/98
1st number: 90/98, 2nd number: 5 1/4
90/98 - 21/4 is -849/196.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 4 is 196
Next, find the equivalent fraction of both fractional numbers with denominator 196 - For the 1st fraction, since 98 × 2 = 196,
90/98 = 90 × 2/98 × 2 = 180/196 - Likewise, for the 2nd fraction, since 4 × 49 = 196,
21/4 = 21 × 49/4 × 49 = 1029/196 - Subtract the two like fractions:
180/196 - 1029/196 = 180 - 1029/196 = -849/196
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