The number of terms in the expression is 2
Answer:
0.98386991
0.9839
Step-by-step explanation:

Notice this is a geometric progression since each number multiplied by some factor equals the next number in the sequence, in this case,

Then by applying the formula for sum to infinity of a geometric progression,
Answer:
5/8
Step-by-step explanation:
40/64
20/32
10/16
5/8