Subtract 81/24 from 7/70, Solve 7/70

Subtract 81/24 from 7/70

1^st number: 7/70, 2^nd number: 3 9/24

7/70 - 81/24 is -131/40.

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,
7/70 = 7 × 12/70 × 12 = 84/840
Likewise, for the 2nd fraction, since 24 × 35 = 840,
81/24 = 81 × 35/24 × 35 = 2835/840
Subtract the two like fractions:
84/840 - 2835/840 = 84 - 2835/840 = -2751/840
After reducing the fraction, the answer is -131/40

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