Percents
if there were 40 people at a concert who were presale ticket holders, and they were 10% of the total concertgoers, how many tickets were sold?
400 tickets
How do you add fractions?
First, make sure you have a common denominator. If you do not, you can find one my finding a common multiple of each denominator. Then, you would multiply each numerator by whatever value you multiplied their denominator by to get the equivalent fraction. Then, you may add the numerators- you do not add the denominators.
3.6+2.4
= 6.0
What is the order of operations?
BEDMAS
Brackets, Exponents, Divide, Multiply, Addition, Subtraction
If I have the question 5+6-4, how do you know what operation to do first?
addition, since addition and subtraction are the same level of BEDMAS, we read it left to right.
If Lebron shoots 76/82 freethrows, what is his percent accuracy? Round your answer to the nearest tenth.
92.7%
what is 3/7 - 2/14? Make sure to reduce your answer
2/7
4.5×0.6
= 2.7
(15−9)×2.5
=6×2.5
=15
Over three winter days, the temperature in Yellowknife changed as follows:
Day 1: dropped by 7°C,
Day 2: rose by 4°C,
Day 3: dropped by 9°C.
If the temperature started at –3°C, what was the final temperature after the third day?
–3 – 7 + 4 – 9 = –15°C
Final answer: –15°C
If a tshirt cost 15$ before a markup of 20%, how much did the tshirt cost after? Round your answer to the nearest hundredth
$18.00
What is 8/36 x 5/19? Reduce.
40/684 which becomes 10/171
12.4−7.85+0.6
=5.15
(12÷3)+4×2
=4+8
=12
The first bell rings every 6 minutes and the second bell every 8 minutes. If they ring together at 8:00 AM, when will they next ring together?
LCM of 6 and 8 = 24
They will both ring at 8:24 AM
If you went to the store and bought a sweater for $82.00 and a pair of sneakers for $120.00, what would your total be after tax, assuming tax is 13%?
$228.26
What is 9/13 ÷ 2/3? Reduce.
27/26 or 1 1/26
(5.4+3.26)÷0.2
=8.66÷0.2
=43.3
3/4×8/9+1/6=
24/36+1/6
=2/3+1/6
=5/6
Samantha wants to plant a vegetable garden in her backyard. The garden is a rectangle that measures 6 1/2 meters in length and 4 3/4 meters in width.
a) What is the total area of the garden in square meters?
b) Samantha plans to plant 1/4 of the garden with tomatoes. How many square meters will be used for tomatoes?
Make sure to reduce all fractions
a) Total garden area = 30 7/8 m²
b) Area for tomatoes = 7 23/32 m²
A store tells you you can pay for a new tv in instalments. They say you can pay 40% now and the rest at a later time. If they charge you $228, how much is the tv in total?
The tv is $570
Ella is making pad thai. The directions for the sauce say to add 2 tablespoons of brown sugar, 3 1/3 tablespoons of soy sauce, 1 2/8 tablespoons of rice wine vinegar, 1/2 tablespoon of sesame oil, 2 5/7 tablespoons of oyster sauce and 2 tablespoons of peanut butter. How many tablespoons of total ingredients did she use?
11 67/84 tablespoons total
(6.25÷0.25)−(3.2×1.5)
=25−4.8
=20.2
A group of students is organizing a fundraiser to sell smoothies.
Each smoothie requires 0.35 L of fruit juice, 0.25 L of yogurt, and ⅛ L of syrup.
They have 12 L of fruit juice, 10 L of yogurt, and 3 L of syrup available.
The cost to make one smoothie is $2.40, and they sell each one for $4.75.
a) What is the maximum number of smoothies they can make with the ingredients they have?
b) How much profit will they make if they sell all of them?
a) Maximum smoothies: 24
b) Total profit: $56.40
A large solar farm produces 3.5 gigawatts (GW) of power each day.
Each home in a nearby city uses 12.5 kilowatt-hours (kWh) of energy per day.
a) How many homes can this solar farm power in one day?
b) Express your answer in scientific notation.
Conversions:
1 GW = 1,000,000 kW
SO: 3.5 GW = 3,500,000 kW
3,500,000÷12.5 = 280,000 homes
Final answers:
a) 280,000 homes
b) 2.8×105 homes