If $400 is invested at the rate of 6% for one year, what will be the total value of the investment (the amount)?
Sowing you a slightly different approach with explanation of how we get there.
We end up with
Percentage is just a fraction but a special one in that the bottom number (denominator) is always set at 100.
So, as a fraction, all of something is
So in this case we have all of the $400 + a bit of the $400
Factoring out the $400 we have:
Trick for non calculator