Twice is same as half add half.
Use the bar method or divide the fraction by fraction.
Read the question carefully. Also multiplicative inverse is the same as reciprocal.
Think how times tables work.
Divison can be written as a fraction of 80 / 28. Now simplify this fraction.
Convert mixed number into improper fraction then divide it by number of days.
Think about converting mixed number to improper fraction and then multiplications.
Multiplicative inverse is same as reciprocal.
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