Subtract 42/80 from 90/40
1st number: 2 10/40, 2nd number: 42/80
90/40 - 42/80 is 69/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
90/40 = 90 × 2/40 × 2 = 180/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Subtract the two like fractions:
180/80 - 42/80 = 180 - 42/80 = 138/80 - After reducing the fraction, the answer is 69/40
- In mixed form: 129/40
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