Subtract 3/40 from 90/20
1st number: 4 10/20, 2nd number: 3/40
90/20 - 3/40 is 177/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
90/20 = 90 × 2/20 × 2 = 180/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
3/40 = 3 × 1/40 × 1 = 3/40 - Subtract the two like fractions:
180/40 - 3/40 = 180 - 3/40 = 177/40 - In mixed form: 417/40
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