N in (-oo:+oo)
-13 = n-8 // - n-8
8-n-13 = 0
-n-5 = 0 // + 5
-n = 5 // * -1
n = -5
n = -5
One Way:
We can change the mixed number to a decimal for comparing.

m =

m = 1.25 m
1.4 m > 1.25 m
Darren > Luke
Darren's jump was higher by (1.4-1.25)
0.15 m
Or another way change the decimal to a fraction and the mixed to an improper fraction too.

=

(Luke)
1.4 =

(Darren)
We need a common denominator to compare

(Luke)

(Darren)

(Luke)

(Darren)

Darren > Luke
By:

-

=

Which is also by
0.15 m
Darren jumps higher and by 0.15 m
Of each ones place.... Or ... The sum of each number? Just trying to help.....
I did this manually on some notepaper but my scanner is not working.
The answer is 72 cm^2
It's kind of like division and mutliplycation I guess