75 x 100 = 7500
75 times 100 is 7500. Because 75 is three quarters of 100, there is a halving route to the answer that beats long multiplication. The working and a live calculator are below.
75 × 100 = 7,500
Adding 75 to itself 100 times gives the same answer.
75 x 100 = 7500
Two zeros attach to 75, giving 7,500 – seven thousand five hundred.
75 is three quarters
Since 75 is three quarters of 100, this answer is three quarters of 10000. Halve 10000 to get 5000, halve that to get 2500, then add: 5000 + 2500 = 7500. The same idea does 75 x 8 in one step, because three quarters of 800 is 600.
Where 7500 shows up
- Money in minor units. Card processors store amounts in cents, so $75.00 is sent as 7500.
- 7500 seconds is 2 hours and 5 minutes.
- Its prime factors are 2 x 2 x 3 x 5 x 5 x 5 x 5, so it divides by 3 and by every power of 5 up to 625. 7500 divided by 625 is 12.
The one to watch
75% of 100 is 75, not 7500. The percent sign quietly divides by another hundred. And 75 x 10 is 750, one zero fewer than this.
Either side of this pair sit 70 x 100 = 7000 and 80 x 100 = 8000. For a rounder starting point there is 50 x 100 = 5000, and the full list is on multiplication answers.