First, your whole number has to become a fraction. Whatever whole number you get or have to use, its denominator (the bottom number of a fraction) will always be 1. Then, you multiply across. You may have to simplify.
Ex:
2/5 x 2
2/5 x 2/1
= 4/5
she ran 15 miles in the first month and 15 in the second but because it doubled in the third month she ran 30 miles. 15+15+30=60 miles total
By seeing the proportion, we get that approximately, 870 g of rice is required and 130 g of meat is required for the recipe.
We are given that a recipe for two people requires 1kg of rice to 150 g of meat.
That is the proportion of rice to meat is:
1 kg : 150 g
1000 g : 150 g
100 : 15
20 : 3
Now, we are also given that 1 kg that is 1000 g of dish is to be prepared.
Let the portion of rice in it be x.
Portion of meat = 1000 - x
ATQ:
20 : 3 :: x : 1000 - x
20 / 3 = x / (1000 - x)
20,000 - 20 x = 3x
23 x = 20,000
x = 20000 / 23 = 870 ( approx.)
1000 - x = 1000 - 870 = 130.
Therefore, by seeing the proportion, we get that approximately, 870 g of rice is required and 130 g of meat is required for the recipe.
Learn more about proportion here:
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3(2)+17-28
multiply 3(2)=6
6+17-28
work left to right
6+17=23
23-28=-5
Use a protractor to measure the angles!