You have 2 quaters and 5 dimes in your pocket write the ratio of quaters to the total number of coins

2:7

You have 2 quarters and the total number of coins is 7.

2 quarters ... 5 dimes ... total of (5 + 2) = 7 coins

ratio of quarters to total number of coins ...

so we have how many quarters? ... there are 2

and what is the total of coins? ... it is 7

so the ratio is 2:7 or 2 to 7 or 2/7 <===

with these types of problems u have to pay close attention to the wording ... because if it wanted the ratio of dimes to total coins, it would be 5:7 ... and if it wanted ratio of quarters to dimes, it would be 2:5 ... so just pay close attention to the wording