# Pawan multiplied a number by 2/5 instead of 5/2, what is the percentage error in the calculation?

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Pawan multiplied a number by 2/5 instead of 5/2, what is the percentage error in the calculation?
posted Jun 18

[X((5/2) - (2/5))]/[X(5/2)] × 100
= [(25 - 4)/10]/[(5/2)] ×100
= 42/50 × 100
= 84% error.

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