Subtract 21/10 from 18/63
1st number: 18/63, 2nd number: 2 1/10
18/63 - 21/10 is -127/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 10 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 10 × 63 = 630,
21/10 = 21 × 63/10 × 63 = 1323/630 - Subtract the two like fractions:
180/630 - 1323/630 = 180 - 1323/630 = -1143/630 - After reducing the fraction, the answer is -127/70
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