Subtract 7/40 from 72/42
1st number: 1 30/42, 2nd number: 7/40
72/42 - 7/40 is 431/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
72/42 = 72 × 20/42 × 20 = 1440/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
7/40 = 7 × 21/40 × 21 = 147/840 - Subtract the two like fractions:
1440/840 - 147/840 = 1440 - 147/840 = 1293/840 - After reducing the fraction, the answer is 431/280
- In mixed form: 1151/280
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