Answer:
It would be -89/100
That is the lowest form and can not be reduced
Not sure its this is right but i got (4,-4)
Good luck
Answer:
The value is 
Step-by-step explanation:
Generally the productivity rate is mathematically represented as

Here K is the ha the farmer could harvest in an hour and Z is a typical yield of corn in kg/ha
Now considering 1970
The productivity rate is

=>
Now considering 1940
The productivity rate is given as
Generally the productivity ratio is mathematically ration is mathematically represented as

=> 
=> 
So, if we look at the number pattern, we can see the numbers go up by 4.
The rule is Add 4.
So, to find the next two terms, we would add 4 to the last number shown, which is 15.
15 + 4 = 19
19 + 4 = 23
So, the next two terms are →19← and →23←.
Glad I could help, and good luck!
AnonymousGiantsFan
Answer:
The answer is 3 1/2.
Step-by-step explanation:
-There are 2 simple ways to do this.
-The first is just subtracting 3/4 and 1/4 which equals 2/4 or 1/2.
-The second way is to turn it into an improper fraction.
-(5*4)+3=23 and (2*4)+1=9.
-23/4-9/4=14/4
-14/4=3 1/2