Question

00
1) a) Find 40 % of 150 litres
Express 45 minutes as a percent of 3 hours.
15 % of a number is 75. Find the number.

Answer 1

Answer:

1) a) 40% of 150 litres

= 40/100 × 150

= 4×15

= 60 litres

b) 3hours = 180 min

A/q

x% of 180 min = 45 min

x/100 × 180 = 45

x = 45 × 100/180

x = 5 × 5

x = 25%

c) A/q

15% of x = 75

15/100 × x = 75

x = 75 × 100/15

x = 5 × 100

x = 500

Answer 2

Step-by-step explanation:

a) 40 % of 150 litres =

$\frac{40\%}{100} \times 150 \\ = 60$

So, 60 liters is the 40% of 150 L.

b) Express 45 minutes as a percent of 3 hours.

1 Hour = 60 minutes

3 Hours = 60*3 = 180 minutes

so, 45minutes of 180minutes

$\frac{45min}{100} \times 180min \\ </u><u>=</u><u> </u><u>5</u><u>*</u><u>5</u><u> </u><u>\</u><u>\</u><u> = </u><u>2</u><u>5</u><u>\%$

c) 15 % of a number is 75. Find the number.

$\frac{15}{100} \times 75 \\ = 11.25\%$

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