maybe 1/5 (409) ::(880) 1+2
The +2 is a reminder to add when he multiply 4*1 (4*1=4+2=6)
4*2=8
4*5=20 (so he writes the 0 with a remainder of 2)
4*1=4+2=6
so,
152x4= 608
15% is .15
<span>.15 x 18 = 2.70 </span>
<span>18 - 2.70 = 15.30</span>
Could you attach a picture, please