Question 1014697
Over a three week period, the price of an gram of gold increased by 25% in the first week, decreased by 20% in the following week, and increased by 5% in the third week. if the price of gold was G dollars per gram at the beginning of the three weeks, what was the price in terms of G at the end of the three weeks? 
solution:
amount = G
1st week: (25% increase) 25% of G = (25/100)x G
                                  = G/4
               increase           = G+(G/4) = 5G/4
2nd week: (20% decrease) 20% of 5G/4 = (20/100)x 5G/4
                                     = (1/5) x 5G/4
                                     = G/4
                decrease             = (5G/4)-(G/4)
                                     = (5G-G)/4
                                     = G
3rd week: (5% increase) 5% of G  = (5/100)x G
                                 = G/20
              increase           = G+(G/20)
                                 = 21G/20