Subtract 40/70 from 60/63, Solve 60/63

Subtract 40/70 from 60/63

60/63 - 40/70 is 8/21.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 63 × 10 = 630,
60/63 = 60 × 10/63 × 10 = 600/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
40/70 = 40 × 9/70 × 9 = 360/630
Subtract the two like fractions:
600/630 - 360/630 = 600 - 360/630 = 240/630
After reducing the fraction, the answer is 8/21

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