Subtract 18/40 from 45/30
1st number: 1 15/30, 2nd number: 18/40
45/30 - 18/40 is 21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
45/30 = 45 × 4/30 × 4 = 180/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
18/40 = 18 × 3/40 × 3 = 54/120 - Subtract the two like fractions:
180/120 - 54/120 = 180 - 54/120 = 126/120 - After reducing the fraction, the answer is 21/20
- In mixed form: 11/20
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