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umka21 [38]
3 years ago
6

When a number is decreased by 17% the result is 15. what is the original number?

Mathematics
1 answer:
Stels [109]3 years ago
8 0

Answer:

original number is 18.07

Step-by-step explanation:

Let the original number be x

x - 17% of x  = 15

x* (1  - 0.17) = 15

x * 0.83 = 15

x = 15/0.83

x = 18.072289156

Or if your wording meant   17% of a number is 15  then:

x * 17% = 15

x *0.17 = 15

x = 15/0.17 = 88.23529...

but I think you meant  "decreased by 17%"   so I choose  x = 18.07

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