Can someone answers this question please master it correctly if it’s corect I will mark you brainliest

Answer:
15 days
Step-by-step explanation:
Out of 16 days, Amy wore a brown shirt on 6 days
6/16 = Simplify as 3/8
3/8 = x/40 Cross multiply
8x = 120 Divide 8 on both sides
x = 15