Ravi ate 2/7 part of cake . Rani ate 4/5 of the remaining. what part of the cake is left
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Step-by-step explanation:
Let the whole cake is equal to 1
So Ravi ate 2/7 and Rani ate 4/5
=1-(2/7+4/5), let us consider 1 as left side and -(2/7+4/5) as right side.
let us solve right side first.
2/7+4/5
= LCM=35, so (2×5)/35+(4×7)/35
=10/35+28/35=38/35
=1-38/35
= LCM is 35, so 35/35-38/35
=-3/35= there is not cake left
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