Subtract 70/45 from 12/42
1st number: 12/42, 2nd number: 1 25/45
12/42 - 70/45 is -80/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
12/42 = 12 × 15/42 × 15 = 180/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
70/45 = 70 × 14/45 × 14 = 980/630 - Subtract the two like fractions:
180/630 - 980/630 = 180 - 980/630 = -800/630 - After reducing the fraction, the answer is -80/63
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