Subtract 75/21 from 28/18
1st number: 1 10/18, 2nd number: 3 12/21
28/18 - 75/21 is -127/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
28/18 = 28 × 7/18 × 7 = 196/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
75/21 = 75 × 6/21 × 6 = 450/126 - Subtract the two like fractions:
196/126 - 450/126 = 196 - 450/126 = -254/126 - After reducing the fraction, the answer is -127/63
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