Question

Find 40% of 500 km.

Answer 1

Hint: Here we will use percent formula i.e. $P%\,of\,q=\dfrac{P}{100}\times q$ to find the result. According to the definition of percentage, one percent is one-hundredth of a whole.


Complete step by step solution:
Here, we have to find 40% of 500.
Use formula P% of q $=\dfrac{P}{100}\times q...(i)$
Here,
P$=40$,$q=500$
Substituting in equation (i), we get
$=\dfrac{40}{100}\times 500$
$=200\,km$
\[\therefore \,40%\,of\,500km\,\,is\,\,200km\]
Additional information: A percentage is really a number telling how many of a specific thing per hundred is. To convert from a decimal to a percentage we need to multiply the decimal by 100. To convert from a percentage to a decimal we need to divide the percentage by 100. Also, in this problem we have to find a given percentage of 500 km. here we should remind ourselves that kilometer is a unit for measurement of length. It is an MKS unit of measurement of length where SI unit of measurement of length is meter(m).
1km=1000m
Kilometer is used for measuring large distances while a meter is used for measurement of small lengths. Other important units of measurement are centimeter, millimeter, micrometer, foot etc. Foot is used for measuring human heights.


Note: In this question, substitute the values of P and q in the given formula and check whether the question demands the result in meter (m) or in kilometer (km) i.e. if we have to find 40% of 500 km and in the question, it is asked to write/convert in meter, then we have to convert km into m. Otherwise, it will remain as it is.