Question

Decrease the length 21 m 48 cm by 5%​

Answer 1

21m 48cm= 2148 cm

5% of 2148= (5/100)×2148=107.4 cm = 1m 7.4 cm

so decreased length= 20m 40.6 cm

Answer 2

Answer:

$\huge{ \bold{ \green{ answer}}}$

$21m + 48cm = 2100cm + 48 = 2148cm$

$decrease \: by \: 5$

$2148 - \frac{5}{100} \times 2148$

$2148 - \frac{1074}{10}$

$2148 - 107.4$

$2040.6$

$2040.6cm$

$20m \: 40.6cm$