Subtract 30/90 from 50/42, Solve 1 8/42

Subtract 30/90 from 50/42

1^st number: 1 8/42, 2^nd number: 30/90

50/42 - 30/90 is 6/7.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 42 × 15 = 630,
50/42 = 50 × 15/42 × 15 = 750/630
Likewise, for the 2nd fraction, since 90 × 7 = 630,
30/90 = 30 × 7/90 × 7 = 210/630
Subtract the two like fractions:
750/630 - 210/630 = 750 - 210/630 = 540/630
After reducing the fraction, the answer is 6/7

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