Kate has a coin collection. She keeps seven of the coins in a box, which is only 5% of her entire collection. What is the total number of coins in Kate's coin collection?

A:12

B:14

C:120

D:140

(D) 140 coins

Step-by-step explanation:

Kate kept seven coins in the box, which is 5% of the entire collection.

This means that 5% of the coins = 7 coins

To find the total number of coins in the box, we need to find 100% of the coins.

5% = 7 coins

To get to 100%, we multiply the equation by 20 (because 5 x 20 is equal to 100).

100% = 7 x 20 = 140 coins

D. 140