What is 7/8 + 5/6 equal to

Which expression is equivalent to the expression shown?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?