Question

Evaluate: (i) 70% of 70 +90% of 90 –120% of120​

Answer 1

${ \boxed{ \huge{ \mathtt{( \frac{70}{100} \times 70 ) + ( \frac{90}{100} \times 90 ) - ( \frac{120}{100} \times 120)}}}} \\ \\ { \boxed{ \huge{ \mathtt{ \frac{4900}{100} + \frac{8100}{100} - \frac{14400}{100} }}}} \\ \\ { \boxed{ \huge{ \mathtt{4900 + 8100 - 14400}}}} \\ \\ { \boxed{ \huge{ \mathtt{13000 - 14400 = { \red{ - 1400}}}}}}$