Subtract 45/80 from 4/28, Solve 4/28

Subtract 45/80 from 4/28

4/28 - 45/80 is -47/112.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 80 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 28 × 20 = 560,
4/28 = 4 × 20/28 × 20 = 80/560
Likewise, for the 2nd fraction, since 80 × 7 = 560,
45/80 = 45 × 7/80 × 7 = 315/560
Subtract the two like fractions:
80/560 - 315/560 = 80 - 315/560 = -235/560
After reducing the fraction, the answer is -47/112

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