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

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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