Subtract 7/10 from 21/48
21/48 - 7/10 is -21/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 10 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 48 × 5 = 240,
21/48 = 21 × 5/48 × 5 = 105/240 - Likewise, for the 2nd fraction, since 10 × 24 = 240,
7/10 = 7 × 24/10 × 24 = 168/240 - Subtract the two like fractions:
105/240 - 168/240 = 105 - 168/240 = -63/240 - After reducing the fraction, the answer is -21/80
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