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12 June, 11:04

Alan deposited 300$ into a savings account. At the end of the year, the amount of money in the account had increased to $336. At the end of the second year, he had 420

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  1. 12 June, 15:00
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    During the first year he had an annual interest of 12%, and in the second year of 25%

    Step-by-step explanation:

    To calculate the interest of the first year:

    (Initial capital of the first year / final capital of the first year) - 1 = interest of the first year

    (300/336) - 1 = 0.12 = 12%

    To calculate the interest of the second year:

    (Initial capital of the secondyear / final capital of the second year) - 1 = interest of the second year

    (336/420) - 1 = 0.25 = 25%
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