Subtract 35/18 from 21/45
1st number: 21/45, 2nd number: 1 17/18
21/45 - 35/18 is -133/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 18 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 18 × 5 = 90,
35/18 = 35 × 5/18 × 5 = 175/90 - Subtract the two like fractions:
42/90 - 175/90 = 42 - 175/90 = -133/90
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