Addressing image tasks
The image shows a range of 1.77 to 1.81, but nothing is highlighted. Usually, when the user asks for a solution for the image, they expect me to tackle all visible parts. I might need to suggest they provide a clearer crop if there are hidden portions. Since the answer should begin with “На фото несколько заданий...,” I want to transcribe the visible math accurately without overdoing it.Computing ratios and fractions
I'm working through some fraction calculations.
For the first part, I confirm that \((7/30 + 1/2 + 4/15)\) simplifies to 1, while the second part \((49/50 - 14/25 - 2/5)\) becomes \(1/50\), leading to a final ratio of 50.
Then there's another expression starting with 39. I suspect it needs reconstruction based on visual clues from an image, possibly missed fractions or exponents due to truncation. It seems I'm piecing together a common mathematical exercise. I'll need to take a closer look!Considering solution confidence
I’m thinking about how to handle question 1.77 despite the cutoff. The conditions are right, but I need to be cautious—guessing isn't the way to go. I can't present 1.77 confidently without the missing text. I could say something like “Если в 1.77 условие действительно ...”, but that feels a bit like speculation.
I can definitely handle questions 1.78 and 1.80 clearly, along with 1.79a. The user likely wants an answer, but I can also solve 1.77 based on what I see while qualifying my response.
Ответ:
а) \(7{,}49=749\%\);
б) \(5{,}7=570\%\);
в) \(0{,}013=1{,}3\%\);
г) \(\dfrac{15}{16}=93{,}75\%\).
Правило: чтобы записать число в процентах, нужно умножить его на \(100\%\).
\[ \begin{aligned} 7{,}49\cdot100\%&=749\%,\\ 5{,}7\cdot100\%&=570\%,\\ 0{,}013\cdot100\%&=1{,}3\%,\\ \frac{15}{16}\cdot100\%&=93{,}75\%. \end{aligned} \]