snell's answer to Zeenath's Primary 6 Maths Percentage Singapore question.
done
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cost
eraser: u
file: 2u
25% of money
5x2u + 10xu = 20u
100% of money
20ux4 = 80u
40% of remaining money
= 40% x 75% of money
= 30% of money
= 30% of 80u
= 24u
30% of money on erasers
no. of erasers bought
= 24u/u
= 24
total no. of erasers bought
= 10+24
= 34
...
eraser: u
file: 2u
25% of money
5x2u + 10xu = 20u
100% of money
20ux4 = 80u
40% of remaining money
= 40% x 75% of money
= 30% of money
= 30% of 80u
= 24u
30% of money on erasers
no. of erasers bought
= 24u/u
= 24
total no. of erasers bought
= 10+24
= 34
...
Date Posted:
4 years ago
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