monthly average usage of sugar for an adult is 3 kg

monthly average usage of sugar for a child is 1 kg

monthly average usage of sugar for a family of 3 adults and 2 children = 3 * 3 + 2 * 1 = 9 + 2 = 11

Actual usage of sugar of a family of 3 adults and 2 children was 13 kg

percent of specific month’s sugar consumption over the typical usage = \(\frac{difference}{original} * 100\)

=> \(\frac{13-11}{11} * 100\) = \(\frac{2}{11} * 100\)

= 18.18% more more than average monthly consumption because specify month consumption > average monthly consumption.

Hence option B
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