Question

28 convert the percentage into a fraction. 40%
a) \\(\frac{4}{10}\\)
b) \\(\frac{1}{2}\\)
c) \\(\frac{2}{5}\\)

1. grace and olivia are in a classroom and want to measure the length of the whiteboard. what unit should they use?

a) inches
b) miles
c) feet

1. sam ate 5 slices of pizza for lunch. jamie ate double that amount. how many slices of pizza did jamie eat?

a) 5 slices
b) 15 slices
c) 10 slices

1. clark and his friends collect baseball cards. one of clark’s card piles is 65 millimeters tall. what is the height of this pile in inches?

a) 2.6 inches
b) 1.7 inches
c) 3.6 inches

1. which set of numbers contains only odd numbers?

a) 246, 488, 802
b) 135, 357, 579
c) 420, 624, 888

1. write the mixed number as an improper fraction: 3 5/8

a) \\(\frac{24}{8}\\)
b) \\(\frac{29}{8}\\)
c) \\(\frac{35}{8}\\)

Explanation:

Question 28

Step1: Recall percentage to fraction conversion

A percentage is a fraction with denominator 100. So, \( 40\%=\frac{40}{100} \).

Step2: Simplify the fraction

Divide numerator and denominator by their greatest common divisor, which is 20. \( \frac{40\div20}{100\div20}=\frac{2}{5} \).

Inches are too small for a whiteboard, miles are too large (used for long distances), and feet are a reasonable unit for measuring the length of a classroom whiteboard.

Step1: Understand "double" means multiply by 2

Sam ate 5 slices. Jamie ate double that, so we calculate \( 5\times2 \).

Step2: Perform the multiplication

\( 5\times2 = 10 \).

Answer:

c) \( \frac{2}{5} \)

Question 29