SAT Math Question of the Day

Math Category: Fractions Level 2:

Q: If 3/40 = 7/2b, then b is equal to:

  1. 21 1/3
  2. 24 1/3
  3. 39 2/3
  4. 42 2/3
  5. 46 2/3

UNANSWERED.

The correct answer is E.

A: 20 is the answer. 46 2/3 is the correct answer.

To solve this problem, cross-multiply.
3/40 = 7/2b
3 × 2b = 40 × 7
6b = 280
b = 280/6 = 46 2/3