In this case, "reduce" and "aid" are not plural because you also have the auxiliary verb "may". This works for singular or plural subjects:

He may run the marathon tomorrow.

Students may use the study rooms in the library.

I think it's more that I learned from the best

Yeah, it's a little weird. I think this is from 1000SC, which is not a great source.

For clarity's sake: Like the grassy fields and old pastures that the upland sandpiper needs for feeding and nesting when it returns in May after wintering in the Argentine Pampas, the sandpipers vanishing in the northeastern United States is a result of residential and industrial development and of ...

From the stem, you know that you're comparing .6A to 1.2B. If A=4B, simply plug in for A:

.6A = .6(4B) = 2.4B

2.4B is 200% of 1.2B.

Statement 2 gives you A in terms of B. Let A=20 and B = 5.

.6A = .6*20 = 12

1.2B = 1.2*5 = 6

12 is 200% of 6.

Rich's explanation is great. I think this question is a great example of using simple examples (like testing simple perfect squares to see what the rule is) to unlock a harder question.

Using the "tug of war" method, we can figure out the ratio of X to Y from the stem alone: Y X 2--5----10 5-2 = 3 10-5 = 5 X:Y = 3:5 Now we just need something that will allow us to go from a proportion to an exact value. 1) Perfect! Using the ratio above, we can determine that x is 6 . 2) ...

1. Productivity is the blue bar, and we see a 1 percent increase in 2008. more 2. Unit labor costs went up by >2% per year for three years, then decreased by <2% for two years. The decrease will not outweigh the increase. higher 3. All five years show positive growth for productivity. 5