First we need to find a common denominator

=

now we can add them

+

=
I think this MIGHT be right I’m not sure but yeah
This question is actually a lot simpler than it seems
for a quarter think about money - a quarter is 25 cents or 1/4 of a dollar - so 1 and a quarter yard in decimal form is equivalent to 1.25
now you need to find how many 1 and a quarter yards are in 3 yards - to do this you simply divide 3 by 1.25
3/1.25 = 2.4
so julie can cut 2.4 1 and a quarter long pieces from the string
if you have any questions about how i answered this question please let me know:)
Answer:
Ok to find the probity we add the amount of boys and the amount of girls together to get 500 and out of these 100 are left handed so 1/5 also know as 20%
Hope This Helps!!!
If you follow the steps of PEMDAS it should be Multiply by 3,subtract 2.