Tricia read 1/4 of her book on Monday. On Tuesday, she read 36% of the book. On Wednesday, she read 0.27 of the book. She finished the book on Thursday. What percent of the book did she read on Thursday?

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100 - (0.25 + 0.36 + 0.27) = ?

Move the decimal point two places to the right to find the percent.

To find out what percent of the book Tricia read on Thursday, we need to first determine how much of the book she had left after Monday, Tuesday, and Wednesday.

On Monday, Tricia read 1/4 of the book.
Therefore, she had 1 - 1/4 = 3/4 of the book left.

On Tuesday, she read 36% of the book.
To find out how much of the book she read, we multiply the decimal form of 36% by the amount of the book she had left.
36% = 0.36 in decimal form.
So, she read 0.36 * (3/4) = 0.27 of the book.
This means she had 3/4 - 0.27 = 0.48 of the book left.

On Wednesday, Tricia read 0.27 of the book.
Thus, she had 0.48 - 0.27 = 0.21 of the book left.

Finally, on Thursday, she finished the book. Therefore, she read the remaining 0.21 of the book.

To determine the percent, we divide the remaining portion by the total book and multiply by 100.
(0.21 / 1) * 100 = 21%.

Therefore, Tricia read 21% of the book on Thursday.

Yes