Question

Andres was training for a running race. He notice that his practice time on thesday had decreased by 7.1% from his monday time. If his monday time was 31.08 seconds, what was his tuesday time -- round to the nearest tenth?

Answer 1

Para calcular el porcentaje multiplicamos la cantidad por el porcentaje convertido a decimales ( dividimos entre 100 )

7.1 % = 0.071

31.08 x 0.071 = 2.20688 segundos
Restamos del tiempo del lunes
31.08 - 2.20688 = 28.87332

Redondeamos a décimas

Tiempo del martes 28.9 segundos