(FS) Praxis I Assessment - Math

Front

What is a ratio?

Back

A ratio is a relationship between two numbers indicating how many times the first number contains the second. For example, the ratio 8:6 can be simplified to 4:3.

Front

How do you express a ratio in simplest form?

Back

To express a ratio in simplest form, divide both terms of the ratio by their greatest common divisor (GCD). For example, for the ratio 8:6, the GCD is 2, so it simplifies to 4:3.

Front

What is percent increase?

Back

Percent increase is a measure of how much a quantity has increased relative to its original amount, expressed as a percentage. It is calculated using the formula: ((new value - old value) / old value) * 100.

Front

How do you calculate percent increase?

Back

To calculate percent increase, subtract the original value from the new value, divide the result by the original value, and multiply by 100. For example, if cars sold increased from 100 to 115, the percent increase is ((115 - 100) / 100) * 100 = 15%.

Front

What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions, allowing them to be added or subtracted. The least common denominator (LCD) is the smallest such multiple.

Front

How do you find the least common denominator (LCD) of two fractions?

Back

Front

What is the formula for distance traveled?

Back

The formula for distance traveled is: Distance = Speed × Time. For example, if a car travels at 70 miles per hour for 8 hours, the distance traveled is 70 × 8 = 560 miles.

Front

How do you calculate the distance between two objects moving at different speeds?

Back

To calculate the distance between two objects moving at different speeds, find the distance each object travels over the same time period and subtract the smaller distance from the larger one.

Front

What is probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 (impossible) and 1 (certain). It can also be expressed as a fraction, decimal, or percentage.

Front

How do you calculate the probability of an event?

Back

To calculate the probability of an event, divide the number of favorable outcomes by the total number of possible outcomes. For example, if a spinner has 8 equal sections and 1 section is labeled 'D', the probability of spinning 'D' is 1/8.