7/х = 100/700
х = 49
15/х = 100/340
х=51
140/х = 100/8
х=11,2
1)700:100×7=49
2)340:100×15=51
3)8:100×140=11,2
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7/х = 100/700
х = 49
15/х = 100/340
х=51
140/х = 100/8
х=11,2
1)700:100×7=49
2)340:100×15=51
3)8:100×140=11,2