Subtract 6/70 from 40/72, Solve 40/72

Subtract 6/70 from 40/72

40/72 - 6/70 is 148/315.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 70 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 72 × 35 = 2520,
40/72 = 40 × 35/72 × 35 = 1400/2520
Likewise, for the 2nd fraction, since 70 × 36 = 2520,
6/70 = 6 × 36/70 × 36 = 216/2520
Subtract the two like fractions:
1400/2520 - 216/2520 = 1400 - 216/2520 = 1184/2520
After reducing the fraction, the answer is 148/315

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