Final answer:
The percent decrease in the length of the board after being cut by 6cm from 34cm is approximately 17.65%
Step-by-step explanation:
When you cut the 34cm board by 6cm, you reduce its length. To find the percent decrease, you need to divide the amount of reduction (6cm) by the original length (34cm) and then multiply by 100%. So the calculation is (6 ÷ 34) * 100 = 17.65%. Therefore, the length of the board decreased by approximately 17.65%.
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