Subtract 42/27 from 9/30, Solve 9/30

Subtract 42/27 from 9/30

1^st number: 9/30, 2^nd number: 1 15/27

9/30 - 42/27 is -113/90.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 27 is 270

Next, find the equivalent fraction of both fractional numbers with denominator 270
For the 1st fraction, since 30 × 9 = 270,
9/30 = 9 × 9/30 × 9 = 81/270
Likewise, for the 2nd fraction, since 27 × 10 = 270,
42/27 = 42 × 10/27 × 10 = 420/270
Subtract the two like fractions:
81/270 - 420/270 = 81 - 420/270 = -339/270
After reducing the fraction, the answer is -113/90

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