Answer:
42%
Explanation:
The best way to start is to work with common units. In this case, seconds are best.
1 minute = 60 seconds
50 minutes = (60 x 50) = 3000 seconds
3000 + 18 = 3018 seconds
This is our first variable.
1 hour = 3600 seconds(if you change to mins then to seconds is fine too)
2 hours = (3600 x 2) = 7200 seconds
From the question, we can tell;
2 hours = 100%
So we need to find out, 50 minutes 18 seconds = x%
( x is our unknown)
7200 seconds = 100%
3018 seconds = ((3018 x 100) ÷ 7200)
41.916 %
Let's round of to the nearest 1
42% (since 9 is higher than 5, we add 1 to the number before it)