Four equivalent expressions for 100k-25k

Regular price is $77.00 and the discount is 5% find the sale price

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

Use the multiplier method to incrases £258 by 43%