Subtract 80/60 from 30/84, Solve 30/84

Subtract 80/60 from 30/84

1^st number: 30/84, 2^nd number: 1 20/60

30/84 - 80/60 is -41/42.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 84 × 5 = 420,
30/84 = 30 × 5/84 × 5 = 150/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
80/60 = 80 × 7/60 × 7 = 560/420
Subtract the two like fractions:
150/420 - 560/420 = 150 - 560/420 = -410/420
After reducing the fraction, the answer is -41/42

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