Question

2.8mm as a per cent of 2.24 cm

Answer 1

we know 1 cm = 10 mm

so, 2.24cm = 2.24*10

                  = 22.4 mm

according to the question,

2.8mm*100/22.4mm

=28*100/224

=2800/224

=1400/112

=700/56

=100/8

=12.5%