Subtract 9/80 from 42/15, Solve 2 12/15

Subtract 9/80 from 42/15

1^st number: 2 12/15, 2^nd number: 9/80

42/15 - 9/80 is 43/16.

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,
42/15 = 42 × 16/15 × 16 = 672/240
Likewise, for the 2nd fraction, since 80 × 3 = 240,
9/80 = 9 × 3/80 × 3 = 27/240
Subtract the two like fractions:
672/240 - 27/240 = 672 - 27/240 = 645/240
After reducing the fraction, the answer is 43/16
In mixed form: 211/16

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