Quarante cinq minutes
In French, you can say "45 minutes après" to mean 45 minutes past the hour.
45 minutes is in English. Or you could say three quarters of an hour.
'Vingt minutes'
dix minutes
cinq minutes.
Cinquante minutes.
vingt-cinq minutes
trente cinq minutes
45 minutes is 3/4 hour. Or say, 45 mins x 60 sec = 2700 seconds. And in 45 minutes, the minute hand of your clock travels 3 right angles.
Minutes? 45 minutes in 45 minutes. If you meant seconds... 45 x 60 = 2700
The question does not say decrease from what.
If you mean .75 of an hour then it is 45 minutes