SAT Math Question of the Day

Math Category: Fractions Level 1:

Q: Simplify 3/4 - 3/10.

  1. 3/10
  2. 7/20
  3. 2/5
  4. 9/20
  5. 1/2

UNANSWERED.

The correct answer is D.

A: The answer is 9/20.

The common denominator is 20.
3/4 - 3/10 = 15/20 - 6/20 = 9/20.