What is 3 1/2% of 250?

2 Answers
Jan 28, 2017

A different approach!

8 3/4

Explanation:

the % is like a unit of measurement that is worth 1/100

So 3 1/2%" is the same as "3 1/2xx1/100 = (3 1/2)/100
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Write as: (3 1/2)/100xx250

This is the same as: 3 1/2xx250/100

Which is the same as 3 1/2xx2.5

Which is the same as 3 1/2xx(2+1/2)

Twice 3 1/2=7
Half of 3 1/2=1 3/4

7+1 3/4=8 3/4

NOTE THAT the question uses fractional format so it is good practice to give the answer in the same format.

3 1/2%" of "250 =8 3/4

Jan 28, 2017

8.75 or 8 3/4

Explanation:

3 1/2 % of 250

:.3.5/cancel100^1 xx cancel250^2.5/1

:.3.5 xx 2.5 =8.75 or 8 3/4

check:

:.cancel(8.75)^.35/(cancel250^10) xx 100/1

:..35/cancel10^1 xx cancel100^10/1

:..35 xx 10=3.5 or 3 1/2 %