Subtract 80/30 from 54/21
1st number: 2 12/21, 2nd number: 2 20/30
54/21 - 80/30 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
54/21 = 54 × 10/21 × 10 = 540/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
80/30 = 80 × 7/30 × 7 = 560/210 - Subtract the two like fractions:
540/210 - 560/210 = 540 - 560/210 = -20/210 - After reducing the fraction, the answer is -2/21
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