Subtract 90/42 from 4/30, Solve 4/30

Subtract 90/42 from 4/30

1^st number: 4/30, 2^nd number: 2 6/42

4/30 - 90/42 is -211/105.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
4/30 = 4 × 7/30 × 7 = 28/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
90/42 = 90 × 5/42 × 5 = 450/210
Subtract the two like fractions:
28/210 - 450/210 = 28 - 450/210 = -422/210
After reducing the fraction, the answer is -211/105

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