Subtract 20/16 from 1/45, Solve 1/45

Subtract 20/16 from 1/45

1^st number: 1/45, 2^nd number: 1 4/16

1/45 - 20/16 is -221/180.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 16 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 45 × 16 = 720,
1/45 = 1 × 16/45 × 16 = 16/720
Likewise, for the 2nd fraction, since 16 × 45 = 720,
20/16 = 20 × 45/16 × 45 = 900/720
Subtract the two like fractions:
16/720 - 900/720 = 16 - 900/720 = -884/720
After reducing the fraction, the answer is -221/180

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