The ball

The ball was discounted by 10 percent and then again by 30 percent. How many percent of the original price is now?

Correct result:

p =  63 %

Solution:

q1=110/100=910=0.9 q2=130/100=710=0.7  q=q1 q2=0.9 0.7=63100=0.63  p=100 q=100 0.63=63%



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