Answer:
3%
Explanation:
It says 21 out of 700 are defective
What we're trying to find: "21 is what % of 700"
We can divide 21/700 to get that answer
21/700 = 0.03 which is 3%
We can set a ratio also
21/700 = x/100
If we cross multiply and divide we end up with
700x = 2100
Divide both by 700 and you get 3... 3%