Subtract 45/30 from 3/84, Solve 3/84

Subtract 45/30 from 3/84

1^st number: 3/84, 2^nd number: 1 15/30

3/84 - 45/30 is -41/28.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 84 × 5 = 420,
3/84 = 3 × 5/84 × 5 = 15/420
Likewise, for the 2nd fraction, since 30 × 14 = 420,
45/30 = 45 × 14/30 × 14 = 630/420
Subtract the two like fractions:
15/420 - 630/420 = 15 - 630/420 = -615/420
After reducing the fraction, the answer is -41/28

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