Subtract 75/30 from 5/21
1st number: 5/21, 2nd number: 2 15/30
5/21 - 75/30 is -95/42.
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,
5/21 = 5 × 10/21 × 10 = 50/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
75/30 = 75 × 7/30 × 7 = 525/210 - Subtract the two like fractions:
50/210 - 525/210 = 50 - 525/210 = -475/210 - After reducing the fraction, the answer is -95/42
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