Subtract 9/49 from 18/70, Solve 18/70

Subtract 9/49 from 18/70

18/70 - 9/49 is 18/245.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 49 is 490

Next, find the equivalent fraction of both fractional numbers with denominator 490
For the 1st fraction, since 70 × 7 = 490,
18/70 = 18 × 7/70 × 7 = 126/490
Likewise, for the 2nd fraction, since 49 × 10 = 490,
9/49 = 9 × 10/49 × 10 = 90/490
Subtract the two like fractions:
126/490 - 90/490 = 126 - 90/490 = 36/490
After reducing the fraction, the answer is 18/245

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