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Answer :

Indacogo

Answer:

13%

Step-by-step explanation:

Subtract 15 from 17 to find the increase -

17 - 15 = 2

Divide 2 by the original friend amount -

2/15 = 0.133

Multiply 0.133 by 100 to find the percent -

13.3

Round to the nearest percent:

13% increase

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