Basic Percentages
10% of 80
8
22% of 50
11
There are 4 dead plants out of 20. What percent of plants are dead?
4 ?
____ = ____
20 100
20%
Which is the correct answer for 0.2 x 0.04
a) 0.08
b) 0.008
c) 8
d) 0.8
b) 0.008
Which of the numbers goes inside the box to divide:
0.4 ÷ 0.08
0.4
20% of 60
12
12% of 25
0.24
In a survey 25% of my friends love dogs. If 8 of them said they love dogs, how many friends do I have?
8 25%
____ = ____
? 100
32
There are two ways to divide decimals.
Method 1: Turn the decimals into fractions. Find a common denominator. Divide the __________.
Method 2: Put the decimals in a division box. Move the decimal on the ________. Move the same to the inside. Rewrite and divide.
Method 1: Numerators
Method 2: outside
5% of 300
15
6% of 25
1.50
According to a recent survey, 45% of people believe in ghosts. If there are 24 students in this class, how many of them believe in ghosts?
45%
____ = ____
24 100
10.8 (between 10 and 11 people)
1.2 x 1.2
1.44
1.2 ÷ 0.04
30
15% of 120
18
90% of 35
31.5
12 30%
____ = ____
? 100
40
0.08 x 0.1
0.008
5 ÷ 0.25
20
10% of 7.8
0.78
You give a 18% tip on your lunch that cost $110 pesos. How much did you tip?
19.80 (or about $20)
Ms. Kramer gave a survey to the 6th grade. 12 out the the 17 teachers said they would change the schedule to have a longer lunch. What percentage of teachers want a longer lunch?
12 ?% = 70.5%
____ = ____
17 100
15 x 0.3
4.5
6.24 ÷ 0.03
208