Answer:
the second one
Step-by-step explanation:
Multiply both numerator and denominator by 2.
4*2 = 8 & 5*2 = 10
4/5 is thus equal to 8/10 or eight-tenths.
With a bar duagram, just divide/split it up evenly into 5 parts then colour in 4 of the pieces. Then, divide as a whole now make it so there's 10 parts - do this by splitting each 5 parts into 2 (put line through middle) to make 10 parts. Now you will see that there is 8 parts that are coloured in for 10 pieces compared to 4 coloured parts when there was 5 pieces.
Answer:
4 kg of sugar would contain 
crystals.
Step-by-step explanation:
Given that 3kg of sugar contains 9 × 10⁸ crystals, let "x" represent the number of sugar crystals 4kg of sugar would contain.
Thus, set up a proportion as follows:
3 kg : 9 × 10⁸ = 4 kg : x
Solve for x. Cross multiply.
Divide both sides by 3
4 kg of sugar would contain crystals.
