Subtract 84/24 from 80/70, Solve 1 10/70

Subtract 84/24 from 80/70

1^st number: 1 10/70, 2^nd number: 3 12/24

80/70 - 84/24 is -33/14.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 24 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 70 × 12 = 840,
80/70 = 80 × 12/70 × 12 = 960/840
Likewise, for the 2nd fraction, since 24 × 35 = 840,
84/24 = 84 × 35/24 × 35 = 2940/840
Subtract the two like fractions:
960/840 - 2940/840 = 960 - 2940/840 = -1980/840
After reducing the fraction, the answer is -33/14

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