26cm of wood is cut off a board 130cm long.what percentage has been cut off?
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26/130 = .20 = 20%
To find out the percentage of wood that has been cut off, you need to calculate the ratio of the length of wood cut off to the original length of the board, and then multiply it by 100.
Step 1: Calculate the ratio of the length of wood cut off to the original length of the board.
Length of wood cut off = 26 cm
Original length of the board = 130 cm
Ratio = Length of wood cut off / Original length of the board
= 26 cm / 130 cm
= 0.2
Step 2: Multiply the ratio by 100 to convert it to a percentage.
Percentage = Ratio * 100
= 0.2 * 100
= 20
Therefore, 26 cm of wood cut off from a board 130 cm long represents 20% of the original length of the board.