Subtract 45/56 from 15/30, Solve 15/30

Subtract 45/56 from 15/30

15/30 - 45/56 is -17/56.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 56 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 30 × 28 = 840,
15/30 = 15 × 28/30 × 28 = 420/840
Likewise, for the 2nd fraction, since 56 × 15 = 840,
45/56 = 45 × 15/56 × 15 = 675/840
Subtract the two like fractions:
420/840 - 675/840 = 420 - 675/840 = -255/840
After reducing the fraction, the answer is -17/56

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