The ratio of local and international calls made by Amy this week is 5 to 2. If the ratio changes to 5 to 3 after Amy makes three more international calls, how many local calls did Amy make this week?
Choose the correct choice from the following:	A) 3	B) 5	C) 10	D) 15	E) 21
The ratio of local and international calls made by Amy this week is 5 to 2   let the current ratio be 5x/2x   the ratio changes to 5 to 3 after Amy makes three more international calls   5x/(2x+3)= 5/3   solving we get x=3   initial ratio 15:6 (5:2) final ratio 15:(6+3)= 15:9= 5:3   so total number of local calls=15   ANSWER:15
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The ratio of local and international calls made by Amy this week is 5 to 2. If the ratio changes to 5 to 3 after Amy makes three more international calls, how many local calls did Amy make this week?