Jorge has saved $250 in four months. Express his rate of savings as a unit rate.?

A. $125 every two months

B. $62.50 every month

C. $60 every month

D. $500 every eight months

1 Answer
Tony B
May 11, 2018

# ($62.50)/("1 month")color(white)("d")larr" Unit rate" #

Option B

Explanation:

#color(blue)("Explaining unit rate")#

Basically this means 'for 1 of' something.

Example: miles per hour, say; #-> (60" miles")/(1" hour") -># 60 mph

So the bottom number of a #color(red)("ratio")# needs to be changed to 1.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#color(blue)("Answering the question")#

Given: #$250 # in 4 months

The time span is months. So unit months will be: 1 month.

Expressing what is given as a fraction:

We have $250 per 4 months #->($250)/("4 months")#

But we need 1 month.

#-> color(white)("ddd") ($250->4)/("4 months"-:4) color(blue)(= ($62.5)/("1 month")color(white)("d")larr" Unit rate") #

Related questions
Impact of this question
1087 views around the world
You can reuse this answer
Creative Commons License