Converting Percents to Decimals
Write 50% as a decimal.
.5 or .50
Find 35% of 100
35
The probability a 6 sided die lands on a 4.
1/6 or .167 or 16.7% or 17%
75% of students at a high school have a sibling. Describe the likelihood a random student has a brother or sister.
Likely.
Write 25% as a decimal.
.25
Find 25% of 240
60
The probability a coin lands on tails.
1/2 or .5 or 50%
10% of people in the world are left-handed. Describe the likelihood a random person you meet is left-handed.
Unlikely.
Write 100% as a decimal.
1 or 1.0 or 1.00
10% of the 600 students at GMS prefer French over Spanish. How many students prefer French at GMS?
60 students.
There are 52 cards in a regular playing deck. 13 of them are diamonds. What is the probability a random card selected is a diamond?
13/52 or .25 or 25%
A college night-club requires participants to be 21 to enter. Describe the likelihood you meet a 14 year old at the club.
Impossible.
.08
8% of 400 people in a small town like the winter over summer. How many people prefer the winter season?
32 people.
There are 50 fish in a pond. 13 of them are bass. What is the probability a bass is randomly caught by a fisher?
13/50 or .26 or 26%
Half the students at GMS like dogs more than cats. Describe the likelihood a random person you meet prefers dogs.
Equally likely.
Write 5.25% as a decimal.
.0525
On average, 5% of people buy candy at the grocery store. On Wednesday, 415 people went to the grocery store, how many do you expect bought candy? (round to the nearest whole number!)
21 people.
A board-game spinner has numbers 1 -13 on it. What is the probability the spinner lands on an odd number? (round to the nearest whole number percent)
54%
Describe the likelihood a classmate you meet at GMS went to 4th grade.
Certain