The Basics
Q#1: This is 60% of 90.
What is 54?
0.6 * 90 = 54
Q#6: This is 60 after a 30% increase.
What is 78?
Q#11: Without solving, this expression represents 30,000 experiencing a 15% increase.
What is 30000 + 30000 * 0.15?
What is 1.15 * 30000?
Q#16: The price of a T-shirt after a discount of 25% if the original price of the T-shirt is $20.
What is $15?
20 - 0.25 * 20 = 20 - 5 = $15
Q#21: This is Mr. Tang's first name.
What is Raymond?
Q#2: The percent of students who got an A if 7 out of 25 students got an A on the English Quiz.
What is 28%?
7/25 = 28/100 = 0.28 = 28%
Q#7: The price of a hat after a 20% coupon is applied to the original price, which is $24.
What is $19.20?
Q#12: Without solving, this expression represents 85 experiencing a 45% decrease.
What is 85 - 0.45 * 85?
What is 0.55 * 85?
Q#17: The amount of money you save by buying a jacket at a 40% discount when it's original price is $200.
What is $80?
Savings: 40% of 200 = 0.4 * 200 = $80
Q#22: A 40% discount means that we are paying this percent of the item.
What is 60% of the item?
Q#3: The percent of the restaurant that is occupied, if there are currently 24 people at the restaurant and the maximum occupancy is 75 people.
What is 32%?
24/75 = 8/25 = 32/100 = 0.32 = 32%
Q#8: The current weight of a German Shepherd after a 20% increase if its previous weight was 54 pounds.
What is 64.8 pounds?
DAILY DOUBLE:
Q#13: The expressions from the ones below that represent a 5% decrease of x.
A) 1.05x B) 0.05x C) x - 0.05x
D) x - 0.95x E) 0.95x F) x - 0.05
What are expressions C and E?
Q#18: The original price of a T-shirt if there was a 25% discount and it brought the price down to $33.
What is $44?
Original experiences a 25% discount
original * 0.75 = 33
33/0.75 = 44
44 after a 25% discount is $33
Q#23: This represents the 100% in the following word problem:
What is last year's population?
Q#4: The number of missed three-pointers if Marvin only made 25% of 40 three-pointers.
What is 30 missed three-pointers?
Marvin makes 25% of 40 -> 10
Marvin misses 75% of 40 -> 30
Q#9: The other method for finding a 35% decrease that does not involve multiplying a whole by 0.35 and then subtracting that product from the whole.
What is multiplying the whole by 0.65 or 65%?
Q#14: Without solving, this equation represents a 20% discount if the original price is x and the final sales price is $400.
What is x * 0.8 = 400?
What is x - 0.2x = 400?
DAILY DOUBLE:
Q#19: The final total of a meal if the bill was $45, tax was 10%, and the tip (applied after tax) is 20%.
What is $59.40?
DAILY DOUBLE:
Q#24: The percent increase if the average grade last month was a 75 and the average this month is 90.
What is a 20% increase?
75 + 0.2 * 75 = 75 + 15 = 90
75 * 0.8 = 90
90 - 75 = 15 ---> 15/75 = 0.20 = 20%
Q#5: This is 130% of 42.
What is 54.6?
42 + 0.3 * 42 = 54.6
42 * 1.3 = 54.6
DAILY DOUBLE:
Q#10: The current number of donuts at a store if it started in the morning with 360 donuts followed by a 30% decrease by noon, and then another 50% increase of the number of donuts at noon.
What is 378 donuts?
30% decrease: 360 - 0.3 * 360 OR 360 * 0.7 = 252
50% increase: 252 + 0.5 * 252 OR 252 * 1.5 = 378
Q#15: The two numbers you would multiply n by if it experiences a 40% decrease followed by a 25% increase (the "FAST WAY").
What are 0.6 and 1.25?
40% decrease: 100%-40%=60%=0.6
25% increase: 100%+25%=125%=1.25
Q#20: The better deal and the reason why.
Deal A: 20% off coupon for a $35 game
Deal B: 40% off coupon for a $10 phone case
What is Deal A because it saves us $3 more than Deal B?
Deal A Savings: 20% of $35 = 0.2 * 35 = $7
Deal B Savings: 40% of $10 = 0.4 * 10 = $4
Q#25: This was the number of tigers at a zoo last year if there was a 10% decrease from last year to this year, and this year, there are 27 tigers at the zoo this year.
What is 30 tigers?
x - 0.10 * x = 27
x * 0.9 = 27
30 * 0.9 = 27