Solving Percent Proportions with Cross Multiplication

This video tutorial teaches how to solve percent proportions using the formula 'part over total equals percent over 100'. It explains the significance of keywords 'of' and 'is' to identify total and part, respectively. The video includes four examples: solving for part, total, percent, and a case with percent over 100, using cross multiplication to find solutions.

What does the word 'of' indicate in percent proportions?

• The part

• The total

• The percent

• The equation

Tags

CCSS.7.RP.A.2C

In the equation part/total = percent/100, what does 'is' refer to?

• The percent

• The part

• The equation

• The total

If 75% of 90 is what number, what is the part?

• 75

• 100

• 67.5

• 90

Tags

CCSS.6.RP.A.3C

What is the first step in solving a percent proportion problem?

• Cross-multiplying

• Identifying the percent

• Dividing by 100

• Writing down the formula

Tags

CCSS.7.RP.A.2B

36 is 25% of what number?

• 100

• 25

• 144

• 36

Tags

CCSS.6.RP.A.3C

What is the total if 36 is the part and 25% is the percent?

• 25

• 36

• 144

• 100

Tags

CCSS.6.RP.A.3C

What percent of 27 is 9?

• 25%

• 33.3%

• 75%

• 50%

If 9 is the part and 27 is the total, what is the percent?

• 50%

• 75%

• 33.3%

• 25%

125% of 64 is what number?

• 125

• 100

• 80

• 64

Tags

CCSS.6.RP.A.3C

What is the part if the percent is 125% and the total is 64?

• 64

• 80

• 125

• 100

Tags

CCSS.6.RP.A.3C