Astudent scale recorded his weight as 160 lb. his weight is actually 164lb. what is the percent error of the scale

The percent error of the scale is 2,5%

Step-by-step explanation:

First Step

Calculate the difference (error) between the weight recorded and the actual weight in lbs.

difference = 164 - 160

difference = 4 lbs

Second Step

Convert the difference into percentage by comparing the difference to the actual weight, then multiplied by 100%

percent of difference =

percent of difference =

percent of difference =

percent of difference = 2,5%

3/10 - 1/5 
lets make a common denomiator of 10.
to do that, we will multiple the bottom and the top of 1/5 by 2
1 * 2= 2   5*2 = 10
so now we have 2/10, so
3/10 - 2/10
when you subtract fractions with common denominators, you never subract the denominators,meaning you don't subract the bottoms, only the tops.
so, 3 - 3 = 1
so your answer is 1/10.
Brainliest please!