## Xiao Jun read a story book. On the first day, he read 15% of the whole book. On the second day, he read 12% of the whole book. There are 146 pages left? (find out the unit "1" relation

Suppose there are x pages in the whole book

15%X=0.15X

12%X=0.12X

0.15X+0.12X+146=X

0.27X+146=X

0.73X=146

X=200

A: the story book has 200 pages

Xiao Jun read a story book. He read 22 pages on the first day and 28 pages on the second day, leaving 60% of the book unread. How many pages are there in total?

1-0.6=0.4

22 + 28 = 50 pages

50 / 0.4 = 125 pages

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