If the original cost was S, then the discounted cost was S - 25% of S = 75% of S pr 0.75*S
So 0.75*S = 24.75
which implies that S = 24.75/0.75 = 33.
24.75
2475/1
33
It is 2475 kilometers from Beijing to Hong Kong.
2475, 4950, 7425, 9900, 12375, 14850, 17325, . . .
LCM(99, 75) = 2475.
As a product of its prime factors in exponents: 32*52*11 = 2475
Prime Factors of 2475 = 3, 3, 5, 5, 11
The LCM is 27225.
5% * 495 5/100 * 495 (5*495)/100 2475/100 24.75
As 2475 is ending with a 5 it can be divided by 5 thus it's not a prime number
45x45=2475