1.

A student multiplied a number by 11/13 instead of 13/11. What is the percentage error in the calculation?1). 39.67 percent2). 28.4 percent3). 14.2 percent4). 19.83 percent

Answer»

LET the NUMBER be x

Wrong number = 11x/13

Actual number = 13x/11

ERROR = 13x/11 – 11x/13 = 48x/143

Percentage error = (48x/143)/(13x/11) × 100 = 28.4%


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