Subtract 40/28 from 30/63
1st number: 30/63, 2nd number: 1 12/28
30/63 - 40/28 is -20/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
30/63 = 30 × 4/63 × 4 = 120/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
40/28 = 40 × 9/28 × 9 = 360/252 - Subtract the two like fractions:
120/252 - 360/252 = 120 - 360/252 = -240/252 - After reducing the fraction, the answer is -20/21
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