When is it easiest to determine the percent of a number using a fraction? using a decimal?

it's easier to use a decimal

percent means parts out of 100

x/100=x%

if you have a decimal, just move the decimal place to the left 2 places

if you have a fraction, try to get the denomenator equal to 100, or divide it out and move the decimal place to the left 2 places

using a decimal is easier to find percent

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: