7 ones and 90 tenths written as a decimal is the same as 7 ones and 9 ones written as a decimal, so the answer is 16.0
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7.90
0.90
90% = 0.9
0.9 = 90%To convert any decimal to percent, simply multiply the decimal by 100.Putting your example into the equation we get: 0.9 × 100 = 90(%)
90 tenths =(9 x 1) + (0/10)9.0