Percentages practice problems - page 21 of 99
Percentages are a way to express a number as a fraction of 100. They are often used to express a proportion or rate, such as a percentage of total sales or a percentage increase or decrease in a value. For example, if a product sells 25 out of 100 units, the percentage of units sold is 25%, which can also be written as 0.25 or 25/100.Percentage points, also known as percentage point change or "pp" for short, is the difference between two percentages. It is often used to express the change in a variable over time or between two groups. For example, if a company's profits increased from 10% to 20% over a year, the percentage point change would be 10 percentage points (20% - 10% = 10%).
Number of problems found: 1962
- Percentages 5
$5.25 is 7 1/2% of what number? - Efficiency
What is the power output of a kettle 2 kW with an efficiency of 90%? - Cuboid enlargement
By how many percent increases the volume of the cuboid if every dimension increases by 30%? - Unknown number 7
16% of the unknown number is 21 less than the unknown number itself. Determine the unknown natural number. - Washing mashine
The family buys a washing machine for 350e. Cash paid 280e. What percentage of the total price must still pay the washer? - Inscribed sphere
How much % of the volume of the cube whose edge is 6 meters long is a volume of a sphere inscribed in that cube? - Sales off
Goods are worth € 70, and the price of goods fell by two weeks in a row by 10%. How much percent decreased overall? - Percentage of waste
In a square plate with a side 75 cm, we cut four same circles. Calculate the percentage of waste. - Parcel
Both dimensions of the rectangular parcel were increased by 31%. By how much % has it increased its acreage? - Ace
We pulled out one card from complete sets of playing cards (32 cards). What is the probability of pulling the ace? - Typing course
Before taking a typing course, Terrence could type 39 words per minute. By the course's end, he could type 68 words per minute. Find the percent increase. - Percentages above 100%
What is 144% of 65? What is the meaning of percentages above 100%? - Equilateral triangle
Calculate the side of an equilateral triangle if its area is 886 mm². - Extreme temperatures
The USA hit an extreme heat wave. Calculate the percentage of the air temperature change from normal summer temperature $t2 °C to $t1 °C. - Businessman 68104
The businessman sells the goods for 28 €, bought in a warehouse for 20 euros. What is his profit? - Percentage 83199
The selling price is 5.75 EUR, and the buying price is 4 EUR. By what percentage was the price increased? - Probability 81677
The probability that a plant will grow from a seed is 75%. What is the probability that 5 plants will grow if we assemble 6 seeds? - Percentage 81296
Milan saved 120 euros per year, and Eduard saved 150 euros. By what percentage did Eduard save more? - Reduced 81099
A square has a side length of 25 cm. How big is its area if the side is reduced by 25%? - Represent 68124
Girls are 12 more than boys, and boys represent 30% of all students. Find how many girls are in the class.
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