Flashcards
Percentage / Decimals
Cards in this deck (8)
- 1Find a percentage part 37% of 120Find 10% so 120 / 10 = 12
30% = 12 x 3 = 36
1% 120 / 100 = 1.2
7% = 7 x 1.2 = 8.4
36 + 8.4 = 44.4 - 2Percentage increase and decrease Computer costs £400 originally was £350 what is the percentage increase.difference / original x 100
£400 - £350 = £50
50 / 400 x 100 = 12.5%(Increase) - 3Reverse percentages A car falls in value by 30% after 1 year it is worth £8,400. What is the price if it was new?current value = 8,400 = 70%(100% - 30%)
1% = 8,400 / 70% = £120
£120 x 100(this is 100%) = £12,000 - 4Reverse percentages as a increase Nitendo sells for £63 affter a 40% increase in price. what did it origionly cost?current price is £63 = 140%(100% + %40)
£63 / 140% = £0.45
£0.45 x 100 = £45 (100%) - 5Multiply decimals 2.3 x 0.0051) Ignore decimals
2) 23 x 5 = 115
3) count how many numbers after decimal point = 3 numbers
4) Place decimal point after same amount of numbers after point = 0.115 - 6Divide 261/ 0.31) Turn the decimal into a whole number.
0.3 x 10 = 3
2) Do the same to the other side
261 x 10 = 2610
3) 2610 / 3 = 870 - 7Equivalents
- 8Dividing and multiplying decimals by multiples of 10 32.5 x 100 = ? 325 / 100 = ?1a) Times you move the decimal point to the left by the number of zeros
Divide you move the decimal point to the right by the number of zeros.
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- BTEC Maths Flashcards on Percentage / Decimals , created by Joseph Goodman on 06/11/2018.
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- Joseph Goodman
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