Subtract 20/30 from 54/7
1st number: 7 5/7, 2nd number: 20/30
54/7 - 20/30 is 148/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
54/7 = 54 × 30/7 × 30 = 1620/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
20/30 = 20 × 7/30 × 7 = 140/210 - Subtract the two like fractions:
1620/210 - 140/210 = 1620 - 140/210 = 1480/210 - After reducing the fraction, the answer is 148/21
- In mixed form: 71/21
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