Final answer:
To find the percentage of cards Cheyenne sold, subtract 3 from the total cards she took, divide that by the total, and multiply by 100. Cheyenne sold approximately 92.86% of the cards.
Step-by-step explanation:
To calculate the percentage of cards Cheyenne sold, we need to find out how many cards she sold at her previous show. Since she sold 3 more cards at her next show, we subtract 3 from the total cards she took to find the number of cards she sold at her previous show. Then, we divide the number of cards sold by the total number of cards and multiply by 100 to find the percentage.
Step 1: Subtract 3 from 42 to find the number of cards Cheyenne sold at her previous show: 42 - 3 = 39 cards.
Step 2: Divide the number of cards sold (39) by the total number of cards (42) and multiply by 100 to find the percentage:
Percentage of cards sold = (39 / 42) * 100
Percentage of cards sold = 0.9286 * 100 = 92.86%
Therefore, Cheyenne sold approximately 92.86% of the cards she took to the craft fair.