Answer:
900
Explanation:
40% of 60% of 25% =54 let y be the certain no.
40/100×60/100×25/100=54
we simplify it which gives us: 2/5×3/5×1/4y=54
3y/50=54. then we cross multiply 3y=50×54
3y/3=2700/3
y=2700/3
y=900
our certain number is 900
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