9/10 of Allien races think invading earth is a bad idea. What percent of alien races think invading earth is a bad idea

90%

Step-by-step explanation:

All percents are made out of 100, so if you can make the bottom number of the fraction (denominator) equal 100, then we can make it into a percent. If you multiply the top and bottom numbers by the same number (10 in this case), which technically equals one, then you get 90/100. This shows that 90% of aliens think that invading earth is a bad idea.

90% of alien races think invading earth is a bad idea.

9 divided by 10 = 0.9

0.9 * 100 = 90