Fractions, decimals and percentages

• 5/10+3/5=


  Convert them both to the same denominator

  
  

  5/10+6/10= 11/10 or do the butterfly method where you do horizontal 5x5=25. 3x10=30. 30+25=55 then x the bottom fractions 10x5 =50 55/10 simplifys to 11/10
• 5/2 x 4/3


  To times fractions just multiply the numerators and the denominators 20/6
• 3/5 ÷ 1/2 =


  3x2=6 and 5x1=5 therefore the answer is 6/5 as you do kfc keep first fraction, flip second fraction, change the divide to a times
• What is 0.04 as a percentage

  what is 0.4 as a percentage 


  0.04=4%

  0.4=40%
• Fractions hack

  
• How to work out a fraction of an amount

  
• The top number (numerator) tells us how many equal parts we have, while the bottom number (denominator) tells us how many equal parts make up the whole.
• Find the value of the reciprocal of 0.8

  To find the reciprocal of a number, you divide 1 by that number. 1/0.8=1.25
• x = 4700 correct to 2 significant figures. (b) Complete the error interval for x. ............................ < x < ............................

  4650≤x<4750