Question

Five percent of what number is 2.5?

Answer 1

I WILL BECOME A FAN AND GIVE MEDALS

Answer 2

@iGreen

Answer 3

Make an equation.

5% of what number is 2.5

'5%' is the same as 0.05

'of' indicates multiplication

'what number' indicates an unknown variable, 'x'

'is' indicates an equal sign.

So we have:

0.05 * x = 2.5

0.05x = 2.5

Divide 0.05 to both sides, what's 2.5 / 0.05?

Answer 4

Let 5% of x = 2.5
\[\frac5 {100} \times x = 2.5\]
\[x = \frac{2.5 \times 100}{5} = 50\]

Answer 5

Thirty percent of what number is 13.5?

Answer 6

Let 30 % of x = 13.5
\[\frac {30}{100} \times x = 13.5\]\[x= \frac{13.5 \times 100}{30} = ? \]

Answer 7

x = 45