We know that Brian took 70% of the time that Angela took to complete the test, so to find how long Brian took to take the history test, we need to multiply the percentage (70%) of time from Angela's time (56 minutes):
70% of 56 = (70/100) * 56 = 0.7 * 56 = 39.2
Brian took 39.2 minutes (39 minutes and 12 seconds) to complete the history test.
