Percents, decimals and fractions

Change the percent to a decimal.

0.3%

• 3

• .03

• 30

• .003

Answer explanation

Move decimal twice to the left.

Order the following from least to greatest

 $\frac{2}{3}$  , 25%,  $\frac{3}{5}$ , 0.40

• 0.40,  $\frac{3}{5}$  , 25%,  $\frac{2}{3}$  

• 25%, 0.40,  $\frac{3}{5}$  ,  $\frac{2}{3}$  

•  $\frac{2}{3}$ , 25%,  $\frac{3}{5}$  , 0.40

•  $\frac{3}{5}$  , 0.40,  $\frac{2}{3}$ , 25%

Answer explanation

25%= .25    $\frac{3}{5}$  = 0.60,  $\frac{2}{3}$ =.66, 0.40
0.25, 0.40, 0.60, 0.66

 

Elsa got 86% on her fist science test, a 47/50 on her second test and a 0.89 on her third test. Which of the following orders her scores from least to greatest?

• 0.86, 0.94, 0.89

• 0.86, 0.89, 0.94

• 0.94, 0.89, 0.84

• 0.89, 0.86, 0.94

Answer explanation

86% = 0.86 47/50= 0.94,  0.89

Cedric can swim a lap in 23 3/5 seconds, Jason can swim a lap in 21.4 seconds. How much faster can Jason swim a lap than Cedric?

• 3.1 seconds

• 2.9 seconds

• 2.2 seconds

• 1.9 seconds

Answer explanation

23 3/5= 23.6

23.6 - 21.4 = 2.2

Tags

CCSS.7.NS.A.3

What is 0.15% written as decimal?

• .0015

• 15

• 1.5

• .015

Answer explanation

0.15% move decimal twice to the left

$\ \ \ \ \ \ \ \ \ \leftarrow$

What is 7.5% written as a fraction?

• 3/4

• 30/40

• 3/400

• 3/40

Answer explanation

if we changed 7.5% to a decimal it would be .075 which is 75 thousandths since the 5 is in thousandths place so when we change it to a fraction it would be over a thousand

75/1000 when simplified (25 is the greatest common factor) it is simplified to 3/40

37/50 written as percent is

Answer explanation

multiply both top and bottom by 2 to get 74/100

3/25 written as a percent is

Answer explanation

Multiply both the top and bottom by 4 to get 12/100

185% written as a decimal and as a mixed number or fraction in simplest form is

write as decimal and mixed number or fraction

0.35%

• .0035; 35/10000

• .0035; 7/2000

• 35; 7/20

• 3.5 ; 7/5

Tags

CCSS.4.NF.C.6