Subtract 54/7 from 36/80, Solve 36/80

Subtract 54/7 from 36/80

1^st number: 36/80, 2^nd number: 7 5/7

36/80 - 54/7 is -1017/140.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 7 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 80 × 7 = 560,
36/80 = 36 × 7/80 × 7 = 252/560
Likewise, for the 2nd fraction, since 7 × 80 = 560,
54/7 = 54 × 80/7 × 80 = 4320/560
Subtract the two like fractions:
252/560 - 4320/560 = 252 - 4320/560 = -4068/560
After reducing the fraction, the answer is -1017/140

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