Subtract 75/40 from 45/21
1st number: 2 3/21, 2nd number: 1 35/40
45/21 - 75/40 is 15/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
45/21 = 45 × 40/21 × 40 = 1800/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
75/40 = 75 × 21/40 × 21 = 1575/840 - Subtract the two like fractions:
1800/840 - 1575/840 = 1800 - 1575/840 = 225/840 - After reducing the fraction, the answer is 15/56
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