25 has 3 factors: 1, 5 and 25. Only those 3 numbers can be evenly divided into 25. 1 is a factor for every number, 5 can be divided into 25, 5 times and a number is always a factor of itself as well.
(0.7p)=p-250
30% off of p must be equal to 250 less than p. As a result you can say that 0.7p (0.7Xp), which is 70% of p (100%-30%=70%) is equal to p-250, so 0.7p=p-250.
As a decimal 3/5 = 0.6
Multiply the height by 0.6:
1st bounce = 125 x 0.6 = 75
2nd bounce = 75 x 0.6 = 45
3rd bounce = 45 x 0.6 = 27
The answer is 27cm
