Question

125g of yoghurt provides 4.5g of protein. How many grams of protein does 100g of yoghurt provide ?

Answer 1

do this question on direct variation
yoghurt protein provided
125 g 4.5 g
100 g x
so
x= 450 /125
x = 3.6 g

Answer 2

$4 \div 125 \times 100 = 3.6$