The Bubble Method ‐ for finding percentages of any number. =10% A =1% ÷ 10 =100% 800 ÷ 10 8 80 ÷ 2 ÷ 2 ÷ 10 =50% 400 40 =5% Bubble method Find 30% of 800 From the bubbles find: 25% = 200 5% = 40 Therefore 30% = 240 ÷ 2 =25% 200 Traditional method Find 30% of 800 30 x 800 100 = 240 How to use your own percentage bubble
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Start at bubble A and enter a value 2
Work your way around the bubbles following the arrows and enter the values Note: The ÷ 10 calculations are horizontal and the ÷ 2 calculations are vertical. Another method Find 30% of 800 100% = 800 (÷ both by 10) 10% = 80 (x both by 2) 20% = 160 Therefore 30% = 80 + 160 = 240 This resource has been adapted from one found on the TES Website (and extra information has been added)
http://www.tes.co.uk/teaching-resource/bubble-method-to-work-out-the-percentage-of-different-amounts-6020692/
This resource kindly contributed by John Thompson, Devon Adult & Community Learning. Search for John on www.skillsworkshop.org
A separate Smart Notebook version of this template is also available on skillsworkshop.org. N2/L2.8 (L1.9) find (simple) percentage parts of
quantities and measurements. L1-2 Functional Maths - understand and use equivalencies between (common) fractions, decimals and percentages.
The Bubble Method ‐ for finding percentages of any number. =10% =1% ÷ 10 ÷ 10 =100% ÷ 2 ÷ 2 ÷ 10 =50% =5% ÷ 2 =25% This resource kindly contributed by John Thompson, Devon Adult & Community Learning. Search for John on www.skillsworkshop.org
A separate Smart Notebook version of this template is also available on skillsworkshop.org. N2/L2.8 (L1.9) find (simple) percentage parts of
quantities and measurements. L1-2 Functional Maths - understand and use equivalencies between (common) fractions, decimals and percentages.