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National 5 Numeracy - Coggle Diagram
National 5 Numeracy
Increasing and decreasing percentages
Decrease 50 of 30%
= 50 x 0.70 = 35
Increase 20 by 50%
= 20 x 1.5 = 30
Ratios – Scaling Ratios
A : B : C
4 : 3 : 1
Grade C = £4
Grade B - (4x3) = £12
Grade A - (4x4) = £16
Compound Interest
increase: original number x (1 + 0.0..) ^yr =
74,000 x (1+0.045) ^3 = £84446.29
decrease: £300, decreases value by 2%, worth after 3yr
3000 x (1 - 0.02)^3
= 2823.576
= £2823. 58
Ratios – Sharing Ratios
total number 4+5+3 = 12
1200/ 12 = 100 (1 share = 100)
4 x 100 = 400
5 x 100 = 500
3 x 100 = 300
A : B : C
4 : 5 : 3
= £400 : £500 : £300
Foreign Currency (To and From)
amount x or / exchange rate
e.g £12.50 x x 1,25 = $15.63
Factions (how much is left)
1 - 1/6 - 2/5 = 13/30
Reading From A Table
|Flight| Insurnace| Credit |
Adult| 140 | 20 | | 0.80 x 140 = 112
Adult| 140 | 20 | 5 |
Child| 112 | 10 | |
Child| 112 | 10 | |
\\\\\ 504 + 60 + 5 = £569 > £260
= £569 x £260 = ££09
= No because they are £309 short.
Foreign Currency – More complex
She took 950 euros and spend 63 a day for 2 weeks
Euros to sterling pounds (£1 = 1.16 euros)
Bank only change the money in multiples of 10 Euros.
how much money will she get in pounds?
63 x 14 = 882 euros
950 - 882 = 68 euros left over
bank only takes 10 so round down 68 to 60 euros
60 / 1.16 = 51.7241
= £51.72
Problem Solving
Ratios – Combining the two
Local Time
Expected Probability