Subtract 42/54 from 7/10, Solve 7/10

Subtract 42/54 from 7/10

7/10 - 42/54 is -7/90.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 54 is 270

Next, find the equivalent fraction of both fractional numbers with denominator 270
For the 1st fraction, since 10 × 27 = 270,
7/10 = 7 × 27/10 × 27 = 189/270
Likewise, for the 2nd fraction, since 54 × 5 = 270,
42/54 = 42 × 5/54 × 5 = 210/270
Subtract the two like fractions:
189/270 - 210/270 = 189 - 210/270 = -21/270
After reducing the fraction, the answer is -7/90

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