The difference between number 20 and its opposite is what percentage of 200? (if you do not remember: opposite of 15 is −15; opposite of −7 is 7.)

Given number is 20Opposite of the number 20 = -20Difference of the number 20 and its opposite = 20 -(-20) = 20 + 20 = 40Let x% of 200 is equal to the difference between number 20 and its oppositex% of 200 = 40[tex] \frac{x}{100}= \frac{40}{200} [/tex]Cross multiply, we get200x = 40(100)200x = 4000Divide both side by 200, to find the value of x[tex] \frac{200x}{200}= \frac{4000}{200} [/tex]x = 20So the number is 20