Subtract 21/90 from 7/48
7/48 - 21/90 is -7/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 48 × 15 = 720,
7/48 = 7 × 15/48 × 15 = 105/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
21/90 = 21 × 8/90 × 8 = 168/720 - Subtract the two like fractions:
105/720 - 168/720 = 105 - 168/720 = -63/720 - After reducing the fraction, the answer is -7/80
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