Question

1. cell phone mark talked on his cell phone 3 hours over the weekend. genaro talked on his phone ( 1 \frac { 9 } { 10 } ) hours. how much longer did mark talk on his phone than genaro? expression:

Explanation:

Step1: Convert mixed number to improper fraction

Genaro's talk - time: \(1\frac{9}{10}=\frac{1\times10 + 9}{10}=\frac{19}{10}\)
Mark's talk - time: \(3=\frac{3\times10}{10}=\frac{30}{10}\)

Step2: Subtract Genaro's time from Mark's time

\(\frac{30}{10}-\frac{19}{10}=\frac{30 - 19}{10}=\frac{11}{10}=1\frac{1}{10}\)

Answer:

Mark talked \(1\frac{1}{10}\) hours longer on his phone than Genaro.