30% + 10% = 40%
40% = 0.40
0.40 * 80 ants = 32 ants
80 - 32 = 48
48 ants came back
Answer: 48
Step-by-step explanation:
you start off with 100% of ants
if 10% lose their way and 30% get eaten, the percent that comes back is
100 - 10 - 30 = 60%
so 60% of 80 is
(0.6 * 80) = 48 ants
so 48 ants come back