To express one quantity as a percentage of another, first we have to express the given quantities as percentage.
To convert the fraction or decimal as percentage, we have to multiply it by 100%.
Example 1 :
On the practice green Tiger sank 13 putts out of 20. Write this as a percentage ?
Solution :
Fraction form = 13/20
Converting it as percentage, we get
= (13/20) x 100%
= 65%
Example 2 :
Mohammed scored 66 marks out of 70 for his chemistry test. What was his percentage ?
Solution :
Marks scored by Mohammed = 66
Total marks = 70
Writing it as fraction, we get
= 66/70
Converting it into percentage = (66/70) x 100%
= 94.28
Approximately 94.3%.
Example 3 :
Erika was late for her bus 3 days out of 22 last month. What percentage of days was she on time ?
Solution :
Number of days she comes late = 3
Total number of day = 22
Writing it as fraction, we get
= 3/22
Converting it as percentage = (3/22) x 100%
= 13.6%
Percentage of days she was on time = 100 - 13.6
= 86.4%
Example 4 :
Phyills sells new cars. Her sales quota for last month was 35 cars. If she sold 43 cars during the month, write this as a percentage of the quota ?
Solution :
Number of cars sold last month = 35 cars
Number of cars sold for this month = 43 cars
Writing it as fraction, we get
= (35/43)
Converting it as percentage, we get
= (35/43) x 100%
= 0.813 x 100%
= 81.3%
Example 5 :
Pierre had $5 in his pocket until he spent 85 cents on some sweets. What percentage of his money did Pierre spend ?
Solution :
Money he has = $5
Money he spent = 0.85
Percentage of money he has spent = (0.85/5) x 100%
= 0.17 x 100%
= 17%
So, 17% of money he has spent.
Example 6 :
Sven walks 475 meters to the underground station, then makes a 3.5 km journey by a train. What percentage of the total distance travelled was on foot ?
Solution :
Distance covered by train = 3.5 km
= 3.5 x 1000
= 3500 meter
Distance covered by walk = 475
Required percentage = (475/3500) x 100%
= 13%
Example 7 :
Leah ate 250 grams of cake from a cake weighing 1 1/2 kg. What percentage of the cake did she eat ?
Solution :
Quantity of cake = 250 grams
Weight of cake = 1 1/2 kg
Converting into grams, we get = 1500 grams
Percentage of cake she eat = (250/1500) x 100%
= 16.6%
= 17%
May 21, 24 08:51 PM
May 21, 24 08:51 AM
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