Question

Katie has read 32% of a book. If she has read 80 pages, how many more pages does Katie have left to read? Please explain

Answer 1

I'll make this easier for you. So we'll break the percent into bits. So 10% of 80 is 8. Multiply that by 3 because you have 30. That gives you 24. Now we have 2% left. So 1% of 80 is .8. Multiply that by two is 1.6. 1.6 + 24 = 25.6. Now you subtract the number of pages read (25.6) from the number of total pages (80). That gets you 54.4. So she needs to read 54 and 2/5 more pages.

Answer 2

Keep note of these things before we start:
-Of is a keyword that tells us multiplication is being done
-x = total number of pages
-32% = 32/100 = .32

Okay, here we go:
32% of total number of pages = 80
.32 of x = 80
.32*x = 80
.32x = 80
.32x/.32 = 80/.32
x = 250

There are 250 pages in total in Katie's book.
To find out how many pages she has to read (y), subtract the pages read from the total:
TOTAL - PAGES READ = PAGES LEFT TO READ
250 - 80 = y
170 = y

Katie has 170 pages left to read
Hope this helps!