Subtract 42/80 from 28/27, Solve 1 1/27

Subtract 42/80 from 28/27

1^st number: 1 1/27, 2^nd number: 42/80

28/27 - 42/80 is 553/1080.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 80 is 2160

Next, find the equivalent fraction of both fractional numbers with denominator 2160
For the 1st fraction, since 27 × 80 = 2160,
28/27 = 28 × 80/27 × 80 = 2240/2160
Likewise, for the 2nd fraction, since 80 × 27 = 2160,
42/80 = 42 × 27/80 × 27 = 1134/2160
Subtract the two like fractions:
2240/2160 - 1134/2160 = 2240 - 1134/2160 = 1106/2160
After reducing the fraction, the answer is 553/1080

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