25/63×21/75 how to solve this by using LCM .! please answer fast
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Since, the roof of the car and the person driving that car are moving with same speed, so the person is in a state of rest with respect to the roof of the car.
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Answer:
Find the least common denominator or LCM of the two denominators:
LCM of 63 and 75 is 1575
Next, find the equivalent fraction of both fractional numbers with denominator 1575
For the 1st fraction, since 63 × 25 = 1575,
5
63
=
5 × 25
63 × 25
=
125
1575
Likewise, for the 2nd fraction, since 75 × 21 = 1575,
21
75
=
21 × 21
75 × 21
=
441
1575
Subtract the two like fractions:
125
1575
-
441
1575
=
125 - 441
1575
=
-316
1575
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