Subtract 12/10 from 21/45
1st number: 21/45, 2nd number: 1 2/10
21/45 - 12/10 is -11/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
12/10 = 12 × 9/10 × 9 = 108/90 - Subtract the two like fractions:
42/90 - 108/90 = 42 - 108/90 = -66/90 - After reducing the fraction, the answer is -11/15
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