Respuesta :

80/100 = 0.80
x = 0.80
0.80x = 20 
x = 20/0.80 
x = 25
Hope this helps you!!! =')
the number is 25 because 80 percent = .8 = 8/10 =4/5. divide the original number by the numerator and multiply the answer by denominator. divide 20 by 4 which equals 5 multiply 5 by 5 an your answer is 25