Hello!
For the 1st part, you have to find 10% of $24.90
To find percents, change the % to a decimal
10% = 0.1
Now, multiply
0.1 × 24.9 = 2.49
She saved $2.49
To find the new price, subtract the original price with the amount she saved.
Original Price = $24.90
She saved = $2.49
24.90 - 2.49 = 22.41
The new price is $22.41
