Subtract 72/30 from 21/35
1st number: 21/35, 2nd number: 2 12/30
21/35 - 72/30 is -9/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 35 × 6 = 210,
21/35 = 21 × 6/35 × 6 = 126/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
72/30 = 72 × 7/30 × 7 = 504/210 - Subtract the two like fractions:
126/210 - 504/210 = 126 - 504/210 = -378/210 - After reducing the fraction, the answer is -9/5
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