Respuesta :

5/3x = ?       ;  where x = 90

90/1 times 5/3

cross  simplification

now it's  30/1 times 5/1    i divided the numerator of the first fraction and the denominator of the second fraction by 3

now it is 5 times 30 

so...   5/3 of a 90 degree angle is       150 degrees