Question

Can someone please help me with the last three?? I don’t know what I keep doing wrong.

Answer 1

1. 78.22%

2. 0.342%

3. 21.77%

Explanation:

To find the percentage, you multiply the fraction of those tested positive/negative (based on the question) out of the total by 100%.

1.
`(970)/(1240)` × 100% = 78.22% (2 d.p.)

2.
`(30)/(8760)` × 100% = 0.342% (3 d.p.)

3.
`(270)/(1240)` × 100% = 21.77% (2 d.p.)