Subtract 70/30 from 18/63
1st number: 18/63, 2nd number: 2 10/30
18/63 - 70/30 is -43/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 30 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
18/63 = 18 × 10/63 × 10 = 180/630 - Likewise, for the 2nd fraction, since 30 × 21 = 630,
70/30 = 70 × 21/30 × 21 = 1470/630 - Subtract the two like fractions:
180/630 - 1470/630 = 180 - 1470/630 = -1290/630 - After reducing the fraction, the answer is -43/21
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