Answer:
Depends on various factors.
Step-by-step explanation:
There are various factors on which the percentage of battery left, depends.
• If the phone screen is large the display will consume more batter than the smaller display from the same battery source.
• If it was just audio played then it will consume battery lesser than the amount of battery consumed when the music video was played because then device consumes battery through display and also supply is needed for the audio source so the discharge will be faster.
• Efficiency of the device also matters a lot. If the device is highly efficient then it will consume lesser battery than other phones.
• It is more of a question of estimation so if initially the battery percentage was 46% and it was used for 42 minutes while listening to music, roughly the battery percentage should be around 18%.
• Roughly about 18% of battery should be left.