Total number = 30
1/5 of 30 = 1/5 x 30 = 6
The attached figures show the total number of filled circles in five lines. Each line have “6” filled circles.
So 5 lines having 6 filled circles = 5 x 6 = 30
Every line represents “1/5” of total amount “30”. Which proved that 1/5 of 30 is equal to 6.