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Question
primary 6 | Maths
| Percentage
2 Answers Below
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Date Posted: 3 years ago
Views: 320
100% - 80% =20%
G → 90×20% = 18
18+30 = 48
90+30 = 120
48÷120 × 100% = 40% (Ans)
G → 90×20% = 18
18+30 = 48
90+30 = 120
48÷120 × 100% = 40% (Ans)
Alternative
30:90 :120=1:3:4 = 5:15:20
20% × 15 = 3
(5+3)÷20 × 100% = 40% (Ans)
30:90 :120=1:3:4 = 5:15:20
20% × 15 = 3
(5+3)÷20 × 100% = 40% (Ans)
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Date Posted:
3 years ago
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