Subtract 42/7 from 9/45, Solve 9/45

Subtract 42/7 from 9/45

1^st number: 9/45, 2^nd number: 6 0/7

9/45 - 42/7 is -29/5.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 45 × 7 = 315,
9/45 = 9 × 7/45 × 7 = 63/315
Likewise, for the 2nd fraction, since 7 × 45 = 315,
42/7 = 42 × 45/7 × 45 = 1890/315
Subtract the two like fractions:
63/315 - 1890/315 = 63 - 1890/315 = -1827/315
After reducing the fraction, the answer is -29/5

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