Subtract 45/21 from 5/30, Solve 5/30

Subtract 45/21 from 5/30

1^st number: 5/30, 2^nd number: 2 3/21

5/30 - 45/21 is -83/42.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
5/30 = 5 × 7/30 × 7 = 35/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
45/21 = 45 × 10/21 × 10 = 450/210
Subtract the two like fractions:
35/210 - 450/210 = 35 - 450/210 = -415/210
After reducing the fraction, the answer is -83/42

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