Algebra 1 Common Core Student Edition, Grade 8-9

(Marvins-Underground-K-12) #1

Lesso n Ch eck


Do y o u k n o w H OW?



  1. W hat percent o f7 0 is 2 1?

  2. W hat percent of 50 is 60?

  3. W hat is 35% of 80?

  4. 75% of w hat n u m b e r is 36?

  5. Finance How m u ch interest will you ea rn by
    investing $1200 at a sim ple interest rate of 2.5% p e r
    year for 6 y e a r s?


\


Do y o u UN DERSTAN D? ^ PRAaf cES
6. V o c a b u l a r y Complete: p% is equivalent to a fraction
w ith a n u m e ra to r of p an d a d en o m in ato r of _?_.


  1. Reasoning You d ep o sited m on ey in a savings
    ac co u n t paying 4% sim ple interest p e r year. The first
    year, you e a rn e d $75 in interest. How m uch interest
    will you earn during th e following year?


8. O p e n - E n d e d Give an exam ple of a p ercen t problem
w here th e p a rt is greater th a n th e base.

Pr act i ce an d Pr o b l em - So l v i n g Ex er ci ses


^ Practice Find each percent.



  1. W hat p ercen t of 75 is 15?

  2. W hat p ercen t of 16 is 10?

  3. W hat p ercen t of 48 is 20?


Find each part.


  1. W hat is 25% of 144?

  2. W hat is 12.5% of 104?

  3. W hat is 125% of 12.8?


MATHEMATICAL
PRACTICES

4^ See Problems 1 and 2.


  1. W hat p ercen t of 15 is 75?

  2. W hat p ercen t of 32 is 40?

  3. W hat p ercen t of 88 is 88?


See Problem 3.


  1. W hat is 63% of 150?

  2. W hat is 150% of 63?

  3. What is 1% of 1?

  4. Shopping A tennis racket norm ally costs $65. The ten n is racket is on sale for 20%
    off. W hat is th e sale price of th e tennis racket?

  5. Hair Care A beauty salon buys bottles of styling gel for $4.50 p e r bottle an d m arks
    u p th e price by 40%. For w hat price does th e salon sell each bottle?


Find each base.


  1. 20 % of w hat n u m b e r is 80?

  2. 60% of w hat n u m b e r is 13.5?

  3. 150% of w hat n u m b e r is 34?


^ See Problem 4.


  1. 80% of w hat n u m b e r is 20?

  2. 160% of w hat n u m b e r is 200?

  3. 1 % of w hat n u m b e r is 1?

  4. Finance You d eposit $1200 in a savings ac co u n t th a t earns sim ple interest
    at a rate of 3% p e r year. How m u c h interest will you have ea rn e d after 3 years?

  5. Finance You deposit $150 in a savings ac co u n t th a t earns sim ple interest at a rate of
    5.5% p e r year. How m u ch interest will you have ea rn ed after 4 years?


See Problem 5.

c


PowerAlgebra.com | Lesso n 2-9 Percents^141
Free download pdf