Find the NEW
Start at 10, increase by 20%
12
A decrease of 25% left Ms. Gil with 213 pencils. How many did she start with?
300 pencils
Increase from 8 to 12, what is the percent change?
50% (increase)
Write an equation:
The water level in a reservoir is now 52 meters. If this was a 23% increase, what was the initial depth?
52=1.23x
or
y=1.23x
What are two strategies that we have used to solve percent problems?
tables, equations, double number lines and tape diagrams
Start at 30, increase by 12%
33.6
Mya has 391 followers on Instagram. This is an increase of 15% from last month. How many followers did Mya have last month?
340
Decrease from 20 to 10, what is the percent change?
50% (decrease)
Write an equation:
The snow is now 52 inches deep. If this was a 77% decrease, what was the initial depth?
52=0.23x
or
y=0.23x
How do you change from a percent to a decimal?
Divide the % by 100
Start at 300, decrease by 25%
225
After a 25% discount, the price of a T-shirt was $12. What was the price before the discount?
$16
Increase from 100 to 120, what is the percent change?
20% (increase)
What equation could you write to find a 10% increase of a number?
Either:
y=1.10x
"or"
"new"= 1.10 * "original"
How do you change from a decimal to percent?
Multiply the decimal by 100
Start at 5, decrease by 10%
4.5
Compared to last year, the population of Boom Town has increased by 25%. The population is now 6,600. What was the population last year?
5,280 (people)
Josh started a savings account with $1,800. After a year, his savings is at $1,944. What is the percent increase?
8%
Write an equation:
A movie theater decreased the size of its popcorn bags by 20%. If the old bags held 15 cups of popcorn, how much do the new bags hold?
"new"=1.20*15
or
y=1.20x
Write 127% as a decimal.
1.27
A grocery store sold 128 water bottles yesterday. Today, they sold 50% more. How many water bottles did the grocery store sell today?
192
The water level in a reservoir is now 52 meters. If this was a 23% increase, what was the original depth?
43.33 ft
The basketball team had $800 for their travel trip. After the trip, they have $163.24 left. What is the percent decrease?
80%
Write an equation:
After a 25% discount, the price of a T-shirt was $12. What was the price before the discount?
12=0.75x
or
y=0.75x
Write 8% as a decimal.
0.08