What is 1/2 minus 9/10?

Looking for the result of 1/2 - 9/10? Follow this step-by-step guide to understand how to subtract these two fractions.

How to subtract 1/2 by 9/10?

1 2 − 9 10 = (1 × 10) − (9 × 2) 2 × 10 = -8 20 = -2 5
  1. Multiply the numerator of the first term, with the denominator of the second term: 1 × 10 = 10
  2. Multiply the numerator of the second term, with the denominator of the first term: 9 × 2 = 18
  3. Subtract both of these results together to form the new numerator: 10 − 18 = -8
  4. Multiply both denominators together to form the new denominator: 2 × 10 = 20
  5. Combine the results to get the new fraction: -8/20
  6. Simplify the fraction (-8/20) by dividing both the numerator and the denominator by their GCD (4):
    • -8/4 = -2
    • 20/4 = 5
  7. This gives: -2/5.

The result of subtracting 1/2 and 9/10 is : -2/5 (or -0.4 in its decimal form)