Subtract 3/80 from 21/15
1st number: 1 6/15, 2nd number: 3/80
21/15 - 3/80 is 109/80.
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,
3/80 = 3 × 3/80 × 3 = 9/240 - Subtract the two like fractions:
336/240 - 9/240 = 336 - 9/240 = 327/240 - After reducing the fraction, the answer is 109/80
- In mixed form: 129/80
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