Answer:

Step-by-step explanation:
We want to find a common factor for

and

We factor each of them to get;

and

We can observe now that;
The factor common to both expression is

Add 15 and 9, then subtract that by 87. 63 should be your answer.
Answer:
so natural numbers are numbers which of 1... to positive infinity
But when we talk about integers are both positive or negative numbers
either from -1 and above or +1 infinity and above
49 = 77% × x
49 = .77x
49/.77 = x
63.64 = x
49 is 77% of 63.64