When a can of soup is half full it weighs 8kg. when it is two fifths full it weighs 7 kg. what is the weight of the full can?
2 answers:
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Writing some equations out might help!
1) You know that a is 4/5 of b. This can be written as:
.
To find what b is equal to, multiply both sides by 5/4:
.
A is 5/4 B.
2) You know that a is 1/5 smaller than b. This can be written as:
.
To find b, just add 1/5 to both sides:
.
B is 1/5 bigger than a.
1) You know that a is 4/5 of b. This can be written as:
To find what b is equal to, multiply both sides by 5/4:
A is 5/4 B.
2) You know that a is 1/5 smaller than b. This can be written as:
To find b, just add 1/5 to both sides:
B is 1/5 bigger than a.