Subtract 20/49 from 30/40, Solve 30/40

Subtract 20/49 from 30/40

30/40 - 20/49 is 67/196.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 49 is 1960

Next, find the equivalent fraction of both fractional numbers with denominator 1960
For the 1st fraction, since 40 × 49 = 1960,
30/40 = 30 × 49/40 × 49 = 1470/1960
Likewise, for the 2nd fraction, since 49 × 40 = 1960,
20/49 = 20 × 40/49 × 40 = 800/1960
Subtract the two like fractions:
1470/1960 - 800/1960 = 1470 - 800/1960 = 670/1960
After reducing the fraction, the answer is 67/196

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