What is 4/10 minus 9/8?

Looking for the result of 4/10 - 9/8? Follow this step-by-step guide to understand how to subtract these two fractions.

How to subtract 4/10 by 9/8?

4 10 − 9 8 = (4 × 8) − (9 × 10) 10 × 8 = -58 80 = -29 40
  1. Multiply the numerator of the first term, with the denominator of the second term: 4 × 8 = 32
  2. Multiply the numerator of the second term, with the denominator of the first term: 9 × 10 = 90
  3. Subtract both of these results together to form the new numerator: 32 − 90 = -58
  4. Multiply both denominators together to form the new denominator: 10 × 8 = 80
  5. Combine the results to get the new fraction: -58/80
  6. Simplify the fraction (-58/80) by dividing both the numerator and the denominator by their GCD (2):
    • -58/2 = -29
    • 80/2 = 40
  7. This gives: -29/40.

The result of subtracting 4/10 and 9/8 is : -29/40 (or -0.725 in its decimal form)