Answer:
Step-by-step explanation:
So for this we have to find the percentage by using 'percentage of error'
If at first it was 15 then it went up to 19 we have to subtract 15 - 19= -4
Ignore the negative. Now divide= 4/19= 0.21
The size went up by 21%
Answer:
40
Step-by-step explanation:
you mutiply then take away the 2 last digits
180=90+50+x
180=140+x
x=180-140=40
X=40
Answer:
40
Step-by-step explanation:
If you think about it, the pattern is: Multiply by 4.
