Percent of Change
Liam decreased the amount of time it takes her to run a mile from 12 minutes to 9 minutes. What is the percent of change?
25%
See example 2
4 in
This procedure has 5 steps.... can you name the first three steps?
2. Identify Keywords (+ or -)
3. x(+ or -) decimalx
A markdown of 60% on a winter coats that cost c dollars
c-0.6c or 0.4c
Sophia has 50% of her paycheck added to her saving account. She has $215 added to her saving account last week. How much was her total check??
$430
From $20 to $12
8 decrease
40%
See example 4
30 ft
Name all Steps of Bat & Ball
Step 1. Set it up
Step 2. SImplify
Step 3 Bat and Ball
Giving a waiter a 15% tip on the price of your m meal.
m+0.15m & 1.15m
In a certain school, there are 4 girls to every 5 boys. If there are 560 girls in the school, how many boys attend the school?
700 boys
From 80 calories to 60 calories
20 decrease
25%
Scale Factor example 3
Scale Factor: 4
Percent of change procedure
FInd the change.
do change over original and set = to x over 100
simplify and do bat& ball
If you buy a shirt and there is an 8% sales tax on the shirt.
x+0.08x & 1.08x
The owner of a a shoe store buys second-hand shoes from customers for $5.00 each. The Owner then resells them for 500% the amount he paid for them. What price is he selling the shoes for now?
$25 per shoe
Elsa increased he math grade from 60% to 84%
Find the percent of change.
40%
Scale Factor Example 5
P to Q Divide by 3
Q to P Multiply 3
Keywords for +
(at least 3 need to match)
Sales Tax
tax
Raise
tip
growth
lengthen
A 6% tax on the final bill, b.
b+0.06b & 1.06b
The distance between Idea Edgemere and Idea Mesquite Hills is 120 Kilometers. There is approximately 4 kilometers in 3 miles. Which is the closets to the number of miles between these schools.
90 miles
From 120 points to 84 points.
36 decrease
30%
Scale Factor see example 8
C to D: multiply by 4
D to C: divide by 4
Keywords for -
(3 need to at least match)
Shorten
Markdown
discount
off
decrease
Jacqui and Mario go out to lunch. Their bill was "b" dollars and a 5% tax was added to the bill.
b+ 0.05b & 1.05b
There were 30 questions on the math exam. Victoria got 18 of the questions correct. What percent of the questions did VIctoria get?
60% questions correct