21
Half of (21 over 25) = 1/2 * 21/25 = 21/50 = 0.42
42 ÷ 2 = 21 centimetres (Therefore, half of 42 is 21.)
21
21.
Half of 21 is 15.5
A half of 42 is 42/2 = 21
21.5 x 0.5 = 10.75
That is 42 half pints
21
10.5
10.5/21 would be one half. So, 17/21 would be greater than one half.