Final answer:
To find the percentage of blue beads, divide the number of blue beads by the total number of beads and multiply by 100. In this case, the percentage of blue beads is 60%.
Step-by-step explanation:
To find the percentage of beads that were blue, divide the number of blue beads by the total number of beads, and then multiply by 100. In this case, there were 420 blue beads out of a total of 700 beads. So, the percentage of blue beads is (420 / 700) * 100 = 60%.
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