Subtract 21/4 from 90/50
1st number: 1 40/50, 2nd number: 5 1/4
90/50 - 21/4 is -69/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 4 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 50 × 2 = 100,
90/50 = 90 × 2/50 × 2 = 180/100 - Likewise, for the 2nd fraction, since 4 × 25 = 100,
21/4 = 21 × 25/4 × 25 = 525/100 - Subtract the two like fractions:
180/100 - 525/100 = 180 - 525/100 = -345/100 - After reducing the fraction, the answer is -69/20
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