Subtract 20/45 from 2/8, Solve 2/8

Subtract 20/45 from 2/8

2/8 - 20/45 is -7/36.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 45 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 8 × 45 = 360,
2/8 = 2 × 45/8 × 45 = 90/360
Likewise, for the 2nd fraction, since 45 × 8 = 360,
20/45 = 20 × 8/45 × 8 = 160/360
Subtract the two like fractions:
90/360 - 160/360 = 90 - 160/360 = -70/360
After reducing the fraction, the answer is -7/36

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