Subtract 1/80 from 21/16, Solve 1 5/16

Subtract 1/80 from 21/16

1^st number: 1 5/16, 2^nd number: 1/80

21/16 - 1/80 is 13/10.

Find the least common denominator or LCM of the two denominators:
LCM of 16 and 80 is 80

Next, find the equivalent fraction of both fractional numbers with denominator 80
For the 1st fraction, since 16 × 5 = 80,
21/16 = 21 × 5/16 × 5 = 105/80
Likewise, for the 2nd fraction, since 80 × 1 = 80,
1/80 = 1 × 1/80 × 1 = 1/80
Subtract the two like fractions:
105/80 - 1/80 = 105 - 1/80 = 104/80
After reducing the fraction, the answer is 13/10
In mixed form: 13/10

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