Subtract 21/40 from 9/5
1st number: 1 4/5, 2nd number: 21/40
9/5 - 21/40 is 51/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
9/5 = 9 × 8/5 × 8 = 72/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
21/40 = 21 × 1/40 × 1 = 21/40 - Subtract the two like fractions:
72/40 - 21/40 = 72 - 21/40 = 51/40 - In mixed form: 111/40
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