Given:
Number = 81
Ratio = 2 : 3 : 4
Hence, the sum of ratio is calculated as follows
Sum of ratios = 2 + 3 + 4 = 9
First divide = 2/9 × 81
= 18
Second divide = 3/9 × 81
= 27
Third divide = 4/9 × 81
= 36
Therefore, 81 can be divided into 18, 27 and 36 in the ratio 2 : 3 : 4.