Question

0.1% of what number is 4?

Answer 1

eg. w stands for what we want to find

0.1% × w = 4
0.1/100 × w = 4
0.1w = 4 × 100
0.1w = 400
w = 400/0.1
w = 4,000

Answer:
0.1% of 4,000 is 4

Answer 2

`0.4`
that is my answer