Subtract 72/30 from 70/42
1st number: 1 28/42, 2nd number: 2 12/30
70/42 - 72/30 is -11/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
70/42 = 70 × 5/42 × 5 = 350/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
72/30 = 72 × 7/30 × 7 = 504/210 - Subtract the two like fractions:
350/210 - 504/210 = 350 - 504/210 = -154/210 - After reducing the fraction, the answer is -11/15
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