I could be very wrong, but I believe the answer is C
Multiply 1/8 by 560
answer: 70
The answer would be 3.4
Hope that helped : )
For the first problem, a "fifth" means divided by 5, so "four-fifths of b" means

or

Subtract means to take away, so "6 subtracted from" means to "take away 6" or -6
As such, the answer to the problem would be

The rest the problems are also just translating English to math.