Percentage & Fractions
Solve 1-20%. Leave your answer as a fraction
80/100 (or something close to it)
True or false: If I want to round 3200.58 to 1 d.p, the answer will be 3000
False (the true answer will be 3200.6)
True or false: 3*10 is the same 3*101
True
There are 3 blue balls and 5 green balls. Write a ratio to represent this. (There are more than one correct answer, as long as you can explain)
3:5 (or something similar)
What is the LCM (Lowest Common Multiple) between 27 and 66
594
What is twenty percent of three quarters
(20/100)*(3/4) = 60/400 = 15% = 3/20
True or false: If I want to round 35.85 to 2 s.f., I will get 36.00
True
Rewrite
3/100
in standard form:
3*10^-2
The ratio between blue balls and green balls is 10:20. How many balls are there in total?
30
True or false:
If I simplify 45/27, I will get
1 2/3
3/5
20 is x% of 80
20/80 = 0.25 = 25%
Estimate 35.8 * 9.8 (You have to show your math to receive all credit)
36*10 (or something close to that will be good)
Solve for ?
8000 = 80*10^?
?=2
Divide 1350 into the ratios of 1:3:5
150: 450: 750
True or false: The HCF for 45 and 90 will be 15
False
Jenny got a raise from her boss. After a 20% raise, her salary became 84,000 RMB. What was her salary before the raise?
70000 * (1+20%)= 84000
85 is rounded up to the nearest single. What will be the lower bound and the upper bound?
85 +/- 0.5
(6*10^5)\div(2*10^4)
3*(10^1)
Mr. Zou is making jungle juice for his friends. The ratio between pineapple juice and apple juice is 3:5. If he made 40 liters of jungle juice, how much pineapple juice did he use?
40 * (3/8) = 15 liters
There are two numbers. Their LCF is 35, and their LCM is 1155. What are these two numbers?
385 and 105
Mr. Zou lost weight. His weight went from 80 to 75 kilograms. Write the decrease as a percentage.
(80-75)/80 = 0.0625 = 6.25%
8.0 is rounded up to the nearest tenth. What will be the lower bound and the upper bound?
lower bound: 7.95
upper bound: 8.04
(4*10^9)+(7*10^10)
(7.4*10^10)
Ketchup is made up of tomatoes and water. 500 grams of tomatoes and 200 grams of water can make 700 grams of ketchup. If Aidan only has 250 grams of tomatoes, how much ketchup can he make?
350 grams.
A new school is deciding whether their lessons should be 30, 50 or 60 minutes long. Each lesson duration fits exactly into the total teaching time of each school day.
How long is the total teaching time of each school day?