Spending

Peter spends 1/5 of his earnings on his rent and he saves 2/7. What fraction of his earnings is left?

Correct result:

x =  0.514

Solution:

s=1/5+2/7=17350.4857 x=1s=10.4857=1835=0.514s=1/5 + 2/7=\dfrac{ 17 }{ 35 } \doteq 0.4857 \ \\ x=1 - s=1 - 0.4857=\dfrac{ 18 }{ 35 }=0.514



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