Subtract 28/63 from 15/40
15/40 - 28/63 is -5/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 63 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 40 × 63 = 2520,
15/40 = 15 × 63/40 × 63 = 945/2520 - Likewise, for the 2nd fraction, since 63 × 40 = 2520,
28/63 = 28 × 40/63 × 40 = 1120/2520 - Subtract the two like fractions:
945/2520 - 1120/2520 = 945 - 1120/2520 = -175/2520 - After reducing the fraction, the answer is -5/72
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