A local hardware store sold 12% of its hammers on Saturday. If the hardware store began with 350 hammers on Saturday, how many hammers were left at the end of the day?

1 Answer
Jan 10, 2017

Answer:

There were 308 hammers left at the end of Saturday.

Explanation:

We can write the equation for this problem as:

#r = h - s#

Where:

#r# is the hammers remaining - what we are trying to calculate.
#h# is the number of hammers to start - 350
#s# is the number of hammers sold - 12% so 350.

We will need to first calculate s:

"Percent" or "%" means "out of 100" or "per 100", Therefore 12% can be written as #12/100#.

When dealing with percents the word "of" means "times" or "to multiply".

Putting this altogether we can write this equation and solve for #s# while keeping the equation balanced:

#s = 12/100 xx 350#

#s = 4200/100#

#s = 42#

We can number solve the equation for the remaining hammers by substitution:

#r = 350 - 42#

#r = 308#