A boy was just measured as part of his annual checkup and turned out to be 58.8 inches tall, which is 1.1% taller than the last time he was measured. How tall was the boy last time?Round your answer to the nearest tenth.

Soluzione

A b oy w a s j u s t m e a s u re d a s p a r t o f hi s ann u a l c h ec k u p an d t u r n e d o u t t o b e 58.8 in c h es t a ll, w hi c h i s 1.1% t a ll er t han t h e l a s t t im e h e w a s m e a s u re d . Ho w t a ll w a s t h e b oy l a s t t im e ? R o u n d yo u r an s w er t o t h e n e a res t t e n t h .

Amount before addition : 58.16023 \dots

Fasi della soluzione

Translate the problem into an equation:

58.8 = x + 0.011 x

58.8 = x + 0.011 x : x = \frac{19600}{337}

\frac{19600}{337} = 58.16023 \dots

Amount before addition : 58.16023 \dots