To find the answer, find 5% of 640 then add that to 640.
5% is equivalent to 5/100, or 1/20
Multiply 640 by 1/20, which is the same as dividing 640 by 20.
640 ÷ 20 = 32
Now add 32 to 640
640 + 32 = 672
Jan can expect to pay $672 monthly next year.
If you have any further questions feel free to ask.
Hope this helps.