Please help me find the answer(LOOK at picture)

Answer:
15%
Step-by-step explanation:
Total families:
[tex]45 + 38 + 27 + 10 = 120[/tex]
Difference between the families:
[tex]45 - 27 = 18[/tex]
Percentage calculation:
[tex]\% = \frac{18 \times 100}{120} = 15\%[/tex]