Gabby has $175 in a savings account that 5% simple interest. how much will she have in the account 12 years later?
If you mean 5% simple interest per year, then she will have $(175 + 12*(5/100)*175) after 12 years.
5% of 175 = 17.5/2 = 8.75.
175+(8.75*12) = 175+105 = $280
She will have $280 in the account after 12 years.
~~Hypotenuisance