Question

Express:2.8 mm as a per cent of 2.24 cm.

Answer 1

Let 2.8 mm is x percent of 2.24 cm.
So,
x% of 2.24 = 2.8/10
x = 0.28 × 100 /2.24 = 25/2 = 12.5
So, 2.8mm is 12.5% of 2.24cm.