Proszę pomoże ktoś ? jak najszybciej

(-9)+(-9)= -18
4+(-3)= 1
4+(-9)= -5
8+(-12)= -4
15+(-6)= 9
11+(-11)= 0
(-2)+3= 1
(-6)+9= 3
(-8)+7= -1
(-10)+6= -4
(-14)+14= 0
(-11)+9= -2
(-50)+(-14)= -64
(-16)+(-13)= -29
(-40)+(-21)= -61
(-31)+42= 12
34+(-15)= 19
(-19)+25= 4
5-6= -1
2-8= -6

I’m guessing that the answer is c, but i’m not sure which grid is being talked about. since 5x5= 25 and 3x3= 9 (which there are no answers for). a is not right because while the ratio is the same, 6/25= 0.24 which is equal to 24% not 30%.