Subtract 4/70 from 80/18, Solve 4 8/18

Subtract 4/70 from 80/18

1^st number: 4 8/18, 2^nd number: 4/70

80/18 - 4/70 is 1382/315.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 18 × 35 = 630,
80/18 = 80 × 35/18 × 35 = 2800/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
4/70 = 4 × 9/70 × 9 = 36/630
Subtract the two like fractions:
2800/630 - 36/630 = 2800 - 36/630 = 2764/630
After reducing the fraction, the answer is 1382/315
In mixed form: 4122/315

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