Convert the following fraction into a decimal. Fraction: 21/40

Could you write the long division method on paper, save it to your PC and then attach it, as the answer to the question? I will upload the question again.

The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

If i had 1234 apples and 1 banana what is the total amount