Subtract 25/16 from 28/21
1st number: 1 7/21, 2nd number: 1 9/16
28/21 - 25/16 is -11/48.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 21 × 16 = 336,
28/21 = 28 × 16/21 × 16 = 448/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
25/16 = 25 × 21/16 × 21 = 525/336 - Subtract the two like fractions:
448/336 - 525/336 = 448 - 525/336 = -77/336 - After reducing the fraction, the answer is -11/48
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