The document explains how to find fractions of numbers. It shows that 1/10 of 40 is 4, as 40 divided by 10 is 4. Similarly, 1/2 of 40 is 20 and 1/4 of 40 is 10. For 36, 1/3 of 36 is 12, as 36 divided by 3 is 12. The document demonstrates finding fractions of numbers by dividing the whole number by the denominator of the fraction. It encourages writing a rule to remind how to calculate fractions of numbers.