The encore

The rock band had a 15-minute encore at their concert, which accounted for 12% of the total length of the concert.
What was the total length of the concert?

Correct result:

x =  125 min

Solution:

p=15 min q=12%=12100=0.12    p=q x 15=0.12 x  0.12x=15  x=125=125 min



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