Subtract 25/80 from 21/15
1st number: 1 6/15, 2nd number: 25/80
21/15 - 25/80 is 87/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
21/15 = 21 × 16/15 × 16 = 336/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
25/80 = 25 × 3/80 × 3 = 75/240 - Subtract the two like fractions:
336/240 - 75/240 = 336 - 75/240 = 261/240 - After reducing the fraction, the answer is 87/80
- In mixed form: 17/80
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