the total is given by the addition of the people less than 35 years and those greater than 35 years so:
QUESTION 1:
x+30=53
x=53-30
x=23
QUESTION 2:
9+x=30
x=30-9
x=21
QUESTION 3:we found that the first number was 23 and to find the total we add it with 9:
23+9=32
QUESTION 4:we found that the second number was 21 and to find the total we add it with 30:
21+30=51
PROOF:when we add the totals of the the people less than 35 years and the people greater than 35 years (which we hot from adding the number in the 3rd and 4th illustrations). If our answers are correct it must give us 83,so let add:
32+51=83
IT GAVE US 83 SO OUR ANSWERS ARE CORRECT
and finally to find the percentage we have 53 as the total so:
(23/32)×100%
0.7187×100%
71.87%
and when we round it it gives us 72%
SO OUR FINAL ANSWER IS 72%