A:b=2:3 b:c=4:5 find a:b:c=

Compare the subtraction problems 6/8 - 5/8 = 1/8 and 6/9 - 7/9 = 1/9 why is the answer to the first problem positive and the answer to the second problem negative

What is the remainder when 2872 is divided by 76? a) 51 b) 57 c) 60 d) 63

If you answer right ill give brainliest, : )