Question

(a) write 7 as a percentage.
(b) write 0.31% as a decimal.
(a) 7 = □%
(b) 0.31% = □

Explanation:

Part (a)

Step1: Recall percentage conversion

To convert a number to a percentage, multiply by 100 and add the % sign. For the number 7, we do \(7\times100\).
\(7\times100 = 700\)

Step2: Add percentage sign

So 7 as a percentage is \(700\%\).

Part (b)

Step1: Recall percentage to decimal conversion

To convert a percentage to a decimal, divide by 100 (or move the decimal point two places to the left). For \(0.31\%\), we do \(0.31\div100\).
\(0.31\div100 = 0.0031\)

Answer:

(a) \(700\%\)
(b) \(0.0031\)