Question 1934
watch the transformation from english to maths...once you understand, you can go from the first line to the last directly.

starting with English...
you got 70% of 20 answers correct

you got 70 percent of 20 answers correct

you got 70 "out of 100" of 20 answers correct

you got (70/100) of 20 answers correct

ending up with maths...
you got (70/100) x 20 answers correct

answer is therefore 14

jon