Seven and eight tenths can be written as 7.8 in decimal notation.
7/8 = 0.875
7/9 = 0.778
.7 (repeating)
0.875
0.7
decimal notation for 2-7over ten = 2.72 7/10= 2 + (7 ÷ 10)= 2 + 0.7= 2.7
Expressed as a decimal fraction, 7 and 8 tenths is equal to 7.8.
To find what distance is 7 percent of 520 ft., convert 7% to decimal notation and multiply that by 520. 7% is .07 in decimal notation, so 7% of 520 is 0.07*520 = 36.4
5.84 x 10-7 = 0.000000584
9.1 x 10-7 = 0.00000091
7*10-4 = 0.0007