Question

-20/21-7/30-(-11)

Answer 1

-(20)/(21)-(7)/(30)-(-11)

Multiply -1 by each term inside the parentheses.
-(20)/(21)-(7)/(30)+11

(2061)/(210)

Combine -(7)/(30)+11-(20)/(21) into a single expression by finding the least common denominator LCD. The LCD of -(7)/(30)+11-(20)/(21) is 210.
687/70

Answer 2

Thanks for the help. I was having trouble with the least common denominator.