You can do 99+1 or (2*5)2
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% means divided by 100 'of' means multiply (30 / 100) * 20 = 6 pounds
Multiply both numbers by five- to get the fraction 85/100... which is 85%
Apart from using a calculator, specifically if you multiply a whole number by a power of 10:* To multiply a whole number by 10, add a zero to the whole number. * To multiply a whole number by 100, add two zeros to the whole number. * Etc.
3/1000 = 0.03% 3/100 = 3%......just add a zero after the decimal. and if you have a calculator it shows up there to
If using a calculator type in 40 divided by 100 and multiplied by 20. Ans: 8 However, if not using a calculator take 10% = 4 and multiply by 2. Ans:8