Jason works out everyday after school. He runs on the treadmill, swims and lift weights. On Friday, he lifted weights for 20 minutes and ran 25 minutes on the treadmill. What was the ratio of the number of minutes he lifted weights to the total number of minutes to his entire workout.

4:9

Step-by-step explanation:

You already know the number of minutes he lifted weights which is 20 minutes, based on the question. Now, we just have to find the total number of minutes to his entire workout.

Total minutes to entire workout = 20 + 25

                                                     = 45 minutes

Number of minutes he lifted weights : Total number of minutes of his workout

20                                                          : 45

4                                                            : 9

(You can further simplify the ratio by dividing 20 and 45 by 5)