I need help calculating my bubble project I was given these instructions

: Record the total number of bubbles that died for each age. Determine the number that survived for each age and record. Calculate the percentage that survived for each age.

Age (seconds)	Without Care	With
0-2
3-5
6-8
9-11
12-14
15-17
18-20
21-23
24-26
27-29
>30

Here is the data for the bubbles without care

Age of Death (seconds)	Tally	Total dead at this "Age"	Total surviving to this "Age"	% Surviving to this age
1	50	0	50	100%
2	50	3	47	94%
3	50	12	38	76%
4	50	15	35	70%
5	50	19	31	62%
6	50	25	25	50%
7	50	37	13	26%
8	50	45	5	10%
9	50	48	2	4%
10	50	50	0	0%
11	50	50	0	0%
12	50	50	0	0%
13	50	50	0	0%
14	50	50	0	0%
15	50	50	0	0%
16	50	50	0	0%
17	50	50	0	0%
18	50	50	0	0%
19	50	50	0	0%
20	50	50	0	0%
21	50	50	0	0%
22	50	50	0	0%
23	50	50	0	0%
24	50	50	0	0%
25	50	50	0	0%
26	50	50	0	0%
27	50	50	0	0%
28	50	50	0	0%
29	50	50	0	0%
30	50	50	0	0%
>30	50	50	0	0%

This is the one with care

Age of Death (seconds)	Tally	Total dead at this "Age"	Total surviving to this "Age"	% Surviving to this age
1	50	0	50	100%
2	50	1	49	98%
3	50	4	46	92%
4	50	10	40	80%
5	50	14	36	72%
6	50	20	30	60%
7	50	33	17	34%
8	50	40	10	20%
9	50	45	5	10%
10	50	47	3	6%
11	50	50	0	0%
12	50	50	0	0%
13	50	50	0	0%
14	50	50	0	0%
15	50	50	0	0%
16	50	50	0	0%
17	50	50	0	0%
18	50	50	0	0%
19	50	50	0	0%
20	50	50	0	0%
21	50	50	0	0%
22	50	50	0	0%
23	50	50	0	0%
24	50	50	0	0%
25	50	50	0	0%
26	50	50	0	0%
27	50	50	0	0%
28	50	50	0	0%
29	50	50	0	0%
30	50	50	0	0%
>30	50	50	0	0%

I really thank you for the help