2-1 warmup decimal and percent conversions

2-1 warmup decimal and percent conversions

Writing Percent as a Decimal

• Since percentages are out of 100%, it is easy to write percentages as decimals

• Simply divide the percent by 100

• Ex)    57% =  $\frac{57}{100}$   = 0.57
  

• Note the number of place values the decimal moves.

Fill in the Blank

Write as a decimal: 34%

Fill in the Blank

Write as a decimal: 47%

Fill in the Blank

Write as a decimal: 7%

Fill in the Blank

Write as a decimal: 100%

Writing Decimal as a Percent

• Multiply the decimal number by 100

• Ex: 0.37 x 100 = 37%

• Be sure to label with %

• Note the number of place values the decimal moved (and which way!)

Fill in the Blank

Write the percent: 0.75

Fill in the Blank

Write the percent: 0.93

Fill in the Blank

Write the percent: 0.05

Fill in the Blank

Write the percent: 0.9

Open your math book to page 80