Essential Question: How do you decimals
to solve percent problems?
Before we
start…
Write
3
4
as a decimal.
Write
3
4
as a percent.
How do I convert …
a percent to a decimal?
Divide by 100
Move the decimal point two
places to the left
a decimal to a percent?
Multiply by 100
Move the decimal point
two places to the right
Small and Large Percents
Percents less than 1% represent numbers less
1
than 0.01 or
.
100
Percents greater than 100% represent numbers
greater than 1.
Write the percent as a decimal.
65%
250%
0.3%
Write the percent as a decimal.
75%
0.4%
168%
Write the percent as a decimal.
0.55%
184%
3%
Write the decimal as a percent.
0.62
1
2.3
Write the decimal as a percent.
0.07
1.9
0.461
Write the decimal as a percent.
0.08
0.578
2.14
How do you decimals to solve
percent problems?
• Convert the percent to a decimal.
• Solve.
Pygmy Hippos The African pygmy hippo is the
smallest species of hippopotamus. Suppose a common
adult hippo weighs 5600 pounds, and an adult pygmy
hippo’s weight is 10.5% of the common adult hippo’s
weight. How much does the adult pygmy hippo weigh?
Cooking In a survey of 1100 adults, 2% chose cooking
as their favorite leisure activity. How many adults chose
cooking?
Parasailing About 5.2% of the 8460 visitors to a
tropical resort last month registered to try parasailing.
Approximately how many visitors registered for
parasailing?
Human Blood The average adult has 10 to 12
pints of blood. Human blood is 83% water. How
many pints of water are in 11 pints of human
blood?
Day of Dread In a survey of 1300 adults, 18%
said the day they dread the most is Monday.
How many adults chose Monday?
Raffle Tickets A total of 400 tickets were sold
for a raffle. The probability that you will win the
prize is 8%. How many of the raffle tickets did
you buy?
Books In a survey of 900 people making a
purchase at a book store, 14% preferred
hardcover books and 42% preferred soft cover
books. How many more people preferred soft
cover books than hardcover books?
How do you decimals to solve percent problems?
Ticket Out the Door
Find 14% of 70.