Since 1 m is 100 cm, 25 m would be 2500 cm.
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1 m / 25 cm = 100 cm / 25 cm = 4
4 m = 400 cm so the fraction is 25/400 = 1/16
The centi- prefix means one hundredth → 1 cm = 0.01 cm The deci- prefix means one tenth → 1 dm = 0.1 cm → 25 cm : 9 dm = 25 × 0.01 m : 9 × 0.1 m = 0.25 m : 0.9 m = 0.25 : 0.9 = 25 : 90 The radio of 25cm to 9 dm is 25:90
2500 cm = 25 m 25 m divided by 5 m = 5 pieces
25 cm x 25 cm