Isaiah and Chakshu went to dinner at Chili's restaurant and received a bill for $35. Isaiah paid the bill along with an additional 20% tip on his charge card. What was the total amount that he put on his charge card?

To find the total amount that Isaiah put on his charge card, we need to calculate the additional 20% tip and add it to the original bill amount.

First, we need to find the amount of the tip. To do this, we multiply the bill amount by the tip percentage (20%).

20% of $35 = 0.20 x $35 = $7

So, the tip amount is $7.

Next, we add the tip amount to the original bill amount.

$35 + $7 = $42

Therefore, the total amount that Isaiah put on his charge card is $42.