Unknown number 10

Number first increased by 30%, then by 1/5. What percentage we've increased the original number?

Correct result:

p =  56 %

Solution:

b=a(1+30/100) (1+1/5)=0  p=100 baa p=100 a(1+30/100) (1+1/5)aa p=100 (1+30/100) (1+1/5)11 p=100 ((1+30/100) (1+1/5)1)=56%



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