If some one has £300 in there saving account and then the bank give them 5% simple interest for 3 years

£347.28

Step-by-step explanation:

First off, someone*, their*, gives*.

But that's not what were here for lol. You can get the answer very simply in this, you just have to multiply 300 by 5% 3 times, but it cant work like that. So you need to convert 5% into a decimal. 5% in decimal form in .05. Since you are getting interest, and you are not losing any money, you will need to add a 1 onto that to signify that you will be staying the same or growing in number. So first, you can multiply 300 by 1.05 to get 315. Then take 315 and do it again by 1.05 to get 330.75. Then finally take that and multiply it by 1.05 to get about 347.28.

Hope this helped ^-^