David had d dollars. After a shopping trip, he returned with c cents.how many cents did he spend?
well, he started out with 100d cents, right?
To determine the number of cents David spent, we need to convert the dollar amount to cents. Since there are 100 cents in a dollar, we multiply the dollar amount by 100 to get the total number of cents.
Let's assume David had $d and returned with c cents. To calculate the amount David spent, we can subtract the amount he returned with from the initial amount he had.
Amount David spent = Amount David had - Amount David returned with
Since we need to convert dollars to cents for the subtraction, we multiply the dollar amount by 100.
Amount David spent = (d * 100) - c
Therefore, the number of cents David spent is (d * 100) - c.