Subtract 45/20 from 21/3
1st number: 7 0/3, 2nd number: 2 5/20
21/3 - 45/20 is 19/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 3 × 20 = 60,
21/3 = 21 × 20/3 × 20 = 420/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
45/20 = 45 × 3/20 × 3 = 135/60 - Subtract the two like fractions:
420/60 - 135/60 = 420 - 135/60 = 285/60 - After reducing the fraction, the answer is 19/4
- In mixed form: 43/4
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