Tom went to buy groceries. The total bill was $50. However, he had a store card that would give him a discount on the groceries. His final bill totaled $42. What percent discount did he save by using his card?
Tom saved 16% on his groceries by using his card.
To calculate the percentage discount, we subtract the final bill ($42) from the original bill ($50) to find the amount saved: $50 - $42 = $8.
Next, we divide the amount saved by the original bill and multiply by 100 to find the percentage discount: ($8 / $50) * 100 = 16%.
Therefore, Tom saved 16% on his groceries by using his card.